In terms of energetics, it takes much less energy to lose two electrons than to gain 6. Chlorine is a yellow-green gas at room temperature. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. The calcium ion (Ca2+), however, has two electrons less. Therefore, its ground state electronic configuration can be written as 1s22s22p63s23p5. Sodiumis a chemical element withatomic number11which means there are 11 protons and 11 electrons in the atomic structure. Read more. Because of its high chemical reactivity, barium is never found in nature as a free element. the electronic configuration of #O^2-# is# 2s ^2## 2p^6#. 4. In itself, the Electron configuration comes to show the position that each electron occupies in the nuclear envelope, thus identifying the energy level in which it is and the type of orbit. Radiumis a chemical element withatomic number88which means there are 88 protons and 88 electrons in the atomic structure. Its properties are thus intermediate between those of chlorine and iodine. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Thechemical symbolfor Lead isPb. Lithiumis a chemical element withatomic number3which means there are 3 protons and 3 electrons in the atomic structure. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrs Manuel (1801) and Sefstrm, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-mile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segr, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Mller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Manganeseis a chemical element withatomic number25which means there are 25 protons and 25 electrons in the atomic structure. Thechemical symbolfor Einsteinium isEs. and Gay-Lussac, L.-J. Scandiumis a chemical element withatomic number21which means there are 21 protons and 21 electrons in the atomic structure. It is occasionally found in native form as elemental crystals. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. The electron configuration states where electrons are likely to be in an atom. Thoriumis a chemical element withatomic number90which means there are 90 protons and 90 electrons in the atomic structure. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Oxidation states are typically represented by integers which may be positive, zero, or negative. Europium is one of the least abundant elements in the universe. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Thechemical symbolfor Silver isAg. This capability allows paramagnetic atoms to be attracted to magnetic fields. How are 1s and 2s orbitals alike/different? This quantum number is dependent on the value of the principal quantum number, n. Therefore, when n has a value of 4, four different subshells are possible. What is meant by the electronic configuration of an element? Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (195.8C) and is used as a coolant. Therefore the O electron configuration will be 1s22s22p4. Required fields are marked *, Representation of electronic Configuration of Atom, Test your knowledge on Electron Configuration. 113Cd has specific absorption cross-section. Thechemical symbolfor Bismuth isBi. Platinum is one of the least reactive metals. Thechemical symbolfor Sulfur isS. Sulfur is abundant, multivalent, and nonmetallic. Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence. same directions and then will double up with electrons spinning the opposite direction. Lawrencium is the final member of the actinide series. And electronic configuration is one is to do as I do two P six. The oxygen atom and C -2 , N -1 NCERT Solutions Class 12 Business Studies, NCERT Solutions Class 12 Accountancy Part 1, NCERT Solutions Class 12 Accountancy Part 2, NCERT Solutions Class 11 Business Studies, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 10 Maths Chapter 1, NCERT Solutions for Class 10 Maths Chapter 2, NCERT Solutions for Class 10 Maths Chapter 3, NCERT Solutions for Class 10 Maths Chapter 4, NCERT Solutions for Class 10 Maths Chapter 5, NCERT Solutions for Class 10 Maths Chapter 6, NCERT Solutions for Class 10 Maths Chapter 7, NCERT Solutions for Class 10 Maths Chapter 8, NCERT Solutions for Class 10 Maths Chapter 9, NCERT Solutions for Class 10 Maths Chapter 10, NCERT Solutions for Class 10 Maths Chapter 11, NCERT Solutions for Class 10 Maths Chapter 12, NCERT Solutions for Class 10 Maths Chapter 13, NCERT Solutions for Class 10 Maths Chapter 14, NCERT Solutions for Class 10 Maths Chapter 15, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, NCERT Solutions for Class 10 Science Chapter 3, NCERT Solutions for Class 10 Science Chapter 4, NCERT Solutions for Class 10 Science Chapter 5, NCERT Solutions for Class 10 Science Chapter 6, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, NCERT Solutions For Class 9 Social Science, NCERT Solutions For Class 9 Maths Chapter 1, NCERT Solutions For Class 9 Maths Chapter 2, NCERT Solutions For Class 9 Maths Chapter 3, NCERT Solutions For Class 9 Maths Chapter 4, NCERT Solutions For Class 9 Maths Chapter 5, NCERT Solutions For Class 9 Maths Chapter 6, NCERT Solutions For Class 9 Maths Chapter 7, NCERT Solutions For Class 9 Maths Chapter 8, NCERT Solutions For Class 9 Maths Chapter 9, NCERT Solutions For Class 9 Maths Chapter 10, NCERT Solutions For Class 9 Maths Chapter 11, NCERT Solutions For Class 9 Maths Chapter 12, NCERT Solutions For Class 9 Maths Chapter 13, NCERT Solutions For Class 9 Maths Chapter 14, NCERT Solutions For Class 9 Maths Chapter 15, NCERT Solutions for Class 9 Science Chapter 1, NCERT Solutions for Class 9 Science Chapter 2, NCERT Solutions for Class 9 Science Chapter 3, NCERT Solutions for Class 9 Science Chapter 4, NCERT Solutions for Class 9 Science Chapter 5, NCERT Solutions for Class 9 Science Chapter 6, NCERT Solutions for Class 9 Science Chapter 7, NCERT Solutions for Class 9 Science Chapter 8, NCERT Solutions for Class 9 Science Chapter 9, NCERT Solutions for Class 9 Science Chapter 10, NCERT Solutions for Class 9 Science Chapter 11, NCERT Solutions for Class 9 Science Chapter 12, NCERT Solutions for Class 9 Science Chapter 13, NCERT Solutions for Class 9 Science Chapter 14, NCERT Solutions for Class 9 Science Chapter 15, NCERT Solutions for Class 8 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions For Class 6 Social Science, CBSE Previous Year Question Papers Class 10, CBSE Previous Year Question Papers Class 12, Important Questions For Class 12 Chemistry, Important Questions For Class 11 Chemistry, Important Questions For Class 10 Chemistry, Important Questions For Class 9 Chemistry, Important Questions For Class 8 Chemistry, Important Questions For Class 7 Chemistry, Important Questions For Class 6 Chemistry, Class 12 Chemistry Viva Questions With Answers, Class 11 Chemistry Viva Questions With Answers, Class 10 Chemistry Viva Questions With Answers, Class 9 Chemistry Viva Questions With Answers, CBSE Previous Year Question Papers Class 10 Science, CBSE Previous Year Question Papers Class 12 Physics, CBSE Previous Year Question Papers Class 12 Chemistry, CBSE Previous Year Question Papers Class 12 Biology, ICSE Previous Year Question Papers Class 10 Physics, ICSE Previous Year Question Papers Class 10 Chemistry, ICSE Previous Year Question Papers Class 10 Maths, ISC Previous Year Question Papers Class 12 Physics, ISC Previous Year Question Papers Class 12 Chemistry, ISC Previous Year Question Papers Class 12 Biology, JEE Main 2022 Question Papers with Answers, JEE Advanced 2022 Question Paper with Answers. Put your understanding of this concept to test by answering a few MCQs. Weight Percent Formula | How to convert weight percent to mole fraction, Difference between congruence and similarity. The same rule will apply to transition metals when forming ions. Since 1s can only hold two electrons the next 2 electrons for O go in the 2s orbital. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jns Jacob/Klaproth, Martin Heinrich. Its boiling point is the lowest among all the elements. So the number of electrons in Annapolis is hmm and the electronic configuration is one is to do is do to be six. Electron Configuration Thechemical symbolfor Magnesium isMg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Thechemical symbolfor Radon isRn. Ar [He]2s2 2p5 Express your answer as a chemical symbol. How many electrons are in any given d sublevel? Magnesiumis a chemical element withatomic number12which means there are 12 protons and 12 electrons in the atomic structure. Bromineis a chemical element withatomic number35which means there are 35 protons and 35 electrons in the atomic structure. The electronic configuration of copper is [Ar]3d104s1. It states that every orbital in a given subshell is singly occupied by electrons before a second electron is filled in an orbital. The electron configuration of hydrogen is 1s1, as illustrated below. For example, silicon has nine possible integer oxidation states from 4 to +4, but only -4, 0 and +4 are common oxidation states. Examples of these metals include \(Sc^{3+}\), \(Ti^{4+}\), \(Zn^{2+}\), and \(Cu^+\). Thus, it can be understood that the 1p, 2d, and 3f orbitals do not exist because the value of the azimuthal quantum number is always less than that of the principal quantum number. The electron configuration of an atom is written with the help of subshell labels. How many electrons are in any given s sublevel? Thechemical symbolfor Lanthanum isLa. Thechemical symbolfor Samarium isSm. Because unpaired electrons can orient in either direction, they exhibit magnetic moments that can align with a magnet. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. This rule describes the order in which electrons are filled in all the orbitals belonging to a subshell. Click Start Quiz to begin! Physical and chemical properties of water? F Enter an abbreviated electron configuration for sodium: Express your answer in complete form, in order of increasing energy [Ne] 3s1 How many orbitals are in the 4f sublevel? Therefore, the abbreviated electron configuration of sodium is [Ne]3s1 (the electron configuration of neon is 1s22s22p6, which can be abbreviated to [He]2s22p6). Thechemical symbolfor Fermium isFm. Thechemical symbolfor Erbium isEr. The electronic configuration of Oxygen is given by, we can write the electron configuration in the orbital diagram as below, Sometimes, we can write the electron configuration in short form as, Where [He] stands for electron configuration of Helium i.e 1s2, A heterogeneous mixture has a non-uniform composition. Praseodymiumis a chemical element withatomic number59which means there are 59 protons and 59 electrons in the atomic structure. Berkelium is a member of the actinide and transuranium element series. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Thanks byjus. Erbiumis a chemical element withatomic number68which means there are 68 protons and 68 electrons in the atomic structure. The electron configuration of an element describes how electrons are distributed in its atomic orbitals. Technetiumis a chemical element withatomic number43which means there are 43 protons and 43 electrons in the atomic structure. 11. Thechemical symbolfor Gallium isGa. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. By the same token, chlorine will be isoelectronic with Argon if it gains one electron, but will have to lose seven electrons to be isoelectronic with neon. Looking at the periodic table, you can see that Oxygen has 8 electrons. Copperis a chemical element withatomic number29which means there are 29 protons and 29 electrons in the atomic structure. An element that is not combined with any other different elements has an oxidation state of 0. Therefore, its 17 electrons are distributed in the following manner: The electron configuration of chlorine is illustrated below. This makes it easier to understand and predict how atoms will interact to form chemical bonds. What is Proton and Neutron in Nucleus - Definition, What is Uranium in the Environment - Definition, What is Quark in the Standard Model - Definition, Helium - Electron Configuration and Oxidation States - He, Hydrogen - Electron Configuration and Oxidation States - H, Lithium - Electron Configuration and Oxidation States - Li, Nitrogen Electron Configuration and Oxidation States N, Fluorine Electron Configuration and Oxidation States F. Actiniumis a chemical element withatomic number89which means there are 89 protons and 89 electrons in the atomic structure. Nevertheless, check the complete configuration and other interesting facts about Oxygen that most people don't know. Thechemical symbolfor Hydrogen isH. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Si 1s2 2s2 2p6 3s2 3p6 Express your answer as a chemical symbol. Poloniumis a chemical element withatomic number84which means there are 84 protons and 84 electrons in the atomic structure. At 0.099%, phosphorus is the most abundant pnictogen in the Earths crust. Which of the following is the smallest in size? For instance, the ground state electronic configuration of calcium (Z=20) is 1s22s22p63s23p64s2. The electrons in an oxygen atom are arranged in shells, numbered from 1 to 4, with Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. The 2s orbital has a greater chance of finding the electron. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Similarly, adding electrons results in a negative oxidation state. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. It is represented by the formula 2n2, where n is the shell number. How many total electrons are in the 1st energy level? Hund's Rule states that electrons must occupy every orbital singly before any orbital is doubly occupied. Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence. For example, the electron configuration of sodium is 1s 2 2s 2 2p 6 3s 1. However, the standard notation often yields lengthy electron Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. the electronic configuration of $$O^2-$$ is$$ 2s ^2$$$$ 2p^6$$. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. al. The number of valence electrons in the atom is. The unpaired electrons are attracted by a magnetic field due to the electrons' magnetic dipole moments. Fermiumis a chemical element withatomic number100which means there are 100 protons and 100 electrons in the atomic structure. Since we need to take away two electrons, we first remove electrons from the outermost shell (n=4). Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. 18. The remaining four electrons will go in the 2p orbital. 2 electrons (CORRECT ANSWER) 3 electrons. We assume no responsibility for consequences which may arise from the use of information from this website. Thechemical symbolfor Nickel isNi. Thechemical symbolfor Thorium isTh. Thechemical symbolfor Zinc isZn. Hunds rule of maximum multiplicity: All the subshells in an orbital must be singly occupied before any subshell is doubly occupied. This principle can also be stated as no two electrons in the same atom have the same values for all four quantum numbers. A magnetic moment is a vector quantity, with a magnitude and a direction. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Exceptions to Aufbau Principle of e- Configuration Periodic Trends Size (atom vs. ions) Effective Nuclear Charge Ionization Energy (IE) Electron Affinity (EA) Relating QNs to the Periodic Table & Electron Configuration 3 s p d f n= n= n= n= n= n= n= s 2 3 Electron Configurations of Multi-electron Atoms. This may leave the atom with many unpaired electrons. Seleniumis a chemical element withatomic number34which means there are 34 protons and 34 electrons in the atomic structure. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Oxygen is the eighth element with a total of 8 electrons. The information contained in this website is for general information purposes only. The electronic configuration for Cl- can, therefore, be designated as 1s22s22p63s23p6. Rheniumis a chemical element withatomic number75which means there are 75 protons and 75 electrons in the atomic structure. Some are hard to memorise (or predict), so what is the electron configuration of an atom of O? The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Chlorine has an atomic number of 17. Rutheniumis a chemical element withatomic number44which means there are 44 protons and 44 electrons in the atomic structure. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Thechemical symbolfor Vanadium isV. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). 15. Thechemical symbolfor Promethium isPm. Oxygen is a nonmetal gaseous substance that is also known as a p-block element. Thechemical symbolfor Phosphorus isP. As an element, phosphorus exists in two major formswhite phosphorus and red phosphorusbut because it is highly reactive, phosphorus is never found as a free element on Earth. Thechemical properties of the atomare determined by the number of protons, in fact, by number andarrangement of electrons. Plutoniumis a chemical element withatomic number94which means there are 94 protons and 94 electrons in the atomic structure. Anything that is magnetic, like a bar magnet or a loop of electric current, has a magnetic moment. This fact has key implications for the building up of the periodic table of elements. The electron configuration of an atom is 1s22s22p6. Because of this, the first two rows of the periodic table are labeled thes block. Titanium can be used in surface condensers. Strontiumis a chemical element withatomic number38which means there are 38 protons and 38 electrons in the atomic structure. How to Write the Electron Configuration for Oxygen Oxygen is the eighth element with a total of 8 electrons. Carbon is the 15th most abundant element in the Earths crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. The Pauli exclusion principle states that a maximum of two electrons, each having opposite spins, can fit in an orbital. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. Its extreme rarity in the Earths crust, comparable to that of platinum. Uranium has the highest atomic weight of the primordially occurring elements. It has an atomic number of 8 and is placed 1s22s22p63s23p64s23d10. If you dont have a chart, you can still find the electron configuration. Hafniumis a chemical element withatomic number72which means there are 72 protons and 72 electrons in the atomic structure. Thechemical symbolfor Californium isCf. Zincis a chemical element withatomic number30which means there are 30 protons and 30 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 C. Arsenicis a chemical element withatomic number33which means there are 33 protons and 33 electrons in the atomic structure. Thuliumis a chemical element withatomic number69which means there are 69 protons and 69 electrons in the atomic structure. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. In writing the electron configuration for oxygen the first two electrons will go in the 1s orbital. How do the electron configurations of transition metals differ from those of other elements? 4 electrons. Einsteinium is the seventh transuranic element, and an actinide. Chemically, indium is similar to gallium and thallium. Check your work by adding the electron numbers to see if they equal the atomic number of the element; for this example, you would write: 2+2+6+2+3=15, which is the atomic number of phosphorus. It occurs on Earth as the decay product of various heavier elements. The electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. That is why, we see the charge of a chlorine ion as -1, not +7. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. This notation for the distribution of electrons in the atomic orbitals of atoms came into practice shortly after the Bohr model of the atom was presented by Ernest Rutherford and Niels Bohr in the year 1913. Thanks byjus. Hence, they are all isoelectronic to each other. Thechemical symbolfor Indium isIn. The remaining four electrons will go in the 2p orbital. How do you write electronic configuration? The symbols used for writing the electron configuration start with the shell number (n) followed by the type of orbital and finally the superscript indicates how many electrons are in the orbital. For example: Looking at the periodic table, you can see that Oxygen has 8 electrons. Cadmiumis a chemical element withatomic number48which means there are 48 protons and 48 electrons in the atomic structure. We add electrons to fill the outermost orbital that is occupied, and then add more electrons to the next higher orbital. What is the electron configuration for a sodium ion? Lead is soft and malleable, and has a relatively low melting point. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Thechemical symbolfor Iridium isIr. It is even less abundant than the so-called rare earths. Lutetiumis a chemical element withatomic number71which means there are 71 protons and 71 electrons in the atomic structure. To calculate the electron configuration for phosphorus (P), which is in the third row, p-block, third element in that block, write: 1s2 2s2 2p6 3s2 3p3. It is by mass the most common element on Earth, forming much of Earths outer and inner core. Step 1: Find the electron configuration For Zn atoms, the electron configuration is 4s 2 3d 10 Step 2: Draw the valence orbitals Step 3: Look for unpaired electrons There are no unpaired Caesium has physical and chemical properties similar to those of rubidium and potassium. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. 1 electron. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Ghring, Otto and Fajans, Kasimir. Thechemical symbolfor Argon isAr. Radonis a chemical element withatomic number86which means there are 86 protons and 86 electrons in the atomic structure. An orbital can at most hold how many electrons? - can be written using the period table or an electron configuration chart. and the term oxidation number is nearly synonymous. In order to write the O electron configuration we first need to know the number of electrons for the O atom (there are 8 electrons). Thechemical symbolfor Osmium isOs. The composition of the sample varies in a heterogeneous mixture. An atom of an element in a compound will have a positive oxidation state if it has had electrons removed. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. -shows the arrangment of electrons around the nucleus of an atom. 21. is a rare earth element with a metallic silver luster. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. See all questions in Electron Configuration. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Thechemical symbolfor Copper isCu. What electron configuration matches an oxygen atom? Carbonis a chemical element withatomic number6which means there are 6 protons and 6 electrons in the atomic structure. Although neodymium is classed as a rare earth, it is a fairly common element. The completely filled d-orbital offers more stability than the partially filled configuration. The number of electrons in Oxygen is 8. It is a soft, silvery-white alkali metal. 3. The atomic number of oxygen is 8, implying that an oxygen atom holds 8 electrons. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atomthe Na+ cation. Lawrenciumis a chemical element withatomic number103which means there are 103 protons and 103 electrons in the atomic structure. Major advantage of lead shield is in its compactness due to its higher density. The electronic configuration of Oxygen is given by. It is the fourth most common element in the Earths crust. Thulium is the thirteenth and third-last element in the lanthanide series. Lead is widely used as a gamma shield. Thechemical symbolfor Neodymium isNd. The electron configuration of Oxygen (O) will be 1s2 2s22p4. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Therefore, the s, p, d, and f subshells can accommodate a maximum of 2, 6, 10, and 14 electrons, respectively. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. Protactiniumis a chemical element withatomic number91which means there are 91 protons and 91 electrons in the atomic structure. Thechemical symbolfor Rhodium isRh. However, how do we know that this is actually taking place and how do we trace what orbital(s)are losing/gaining electrons? It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. 6. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Thank you for such a useful information, I am in 6th grade and because of byjus, am able to understand all the 8th grade concepts, thats awesom content i learnt very well thank you byjus. 3. How many electrons can the first energy level hold? O2- = 1s *1s 2s *2s 2pz (2px=2py)(*2px=*2py) Hope it helps You should note that thenselectrons are always lost before the (n-1)d when forming cations for transition metals. What atom matches this electron configuration? Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Thechemical symbolfor Ruthenium isRu. Therefore, if the principal, azimuthal, and magnetic numbers are the same for two electrons, they must have opposite spins. Thechemical symbolfor Chromium isCr. Electron Configuration Notation: All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge a cation, which combines with anions to form salts. Oxygenis a chemical element withatomic number8which means there are 8 protons and 8 electrons in the atomic structure. The number of electrons in Calcium is 20. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Electron configuration is the Arrangement of electrons in different orbitals of an atom. For example, the electron configuration for Zn: [Ar]4s23d10, the electron configuration for Zn+2: [Ar]3d10. Your Mobile number and Email id will not be published. Possible oxidation states are +3,4. Thechemical symbolfor Silicon isSi. As shown in Video 9.6.1, since molecular oxygen (\(O_2\) is paramagnetic, it is attracted to the magnet. Xenon is a colorless, dense, odorless noble gas found in the Earths atmosphere in trace amounts. Silveris a chemical element withatomic number47which means there are 47 protons and 47 electrons in the atomic structure. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Only about 5108% of all matter in the universe is europium. Nitrogenis a chemical element withatomic number7which means there are 7 protons and 7 electrons in the atomic structure. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan Jos and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. Niobiumis a chemical element withatomic number41which means there are 41 protons and 41 electrons in the atomic structure. Oxygen Overview Oxygen Complete Electron Configuration Step 4: Determine whether the substance is paramagnetic or diamagnetic. What is the ground state electron configuration of the element germanium? Argon is the third-most abundant gas in the Earths atmosphere, at 0.934% (9340 ppmv). How many electrons are in any given p sublevel? Answer (1 of 5): O2- has 16 + 2 = 18 electrons ( 2 units of -ve charge means 2 more electrons than the no. Neodymiumis a chemical element withatomic number60which means there are 60 protons and 60 electrons in the atomic structure. We can study the magnetic properties of matter to help us tackle this problem. Similarly, thep blockare the right-most six columns of the periodic table, thed blockis the middle 10 columns of the periodic table, while thef blockis the 14-column section that is normally depicted as detached from the main body of the periodic table. Iridiumis a chemical element withatomic number77which means there are 77 protons and 77 electrons in the atomic structure. Calciumis a chemical element withatomic number20which means there are 20 protons and 20 electrons in the atomic structure. Thechemical symbolfor Lutetium isLu. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. Thechemical symbolfor Bromine isBr. Your Mobile number and Email id will not be published. Nobeliumis a chemical element withatomic number102which means there are 102 protons and 102 electrons in the atomic structure. Neodymium is a soft silvery metal that tarnishes in air. Carbon is one of the few elements known since antiquity. Thechemical symbolfor Tellurium isTe. Lanthanumis a chemical element withatomic number57which means there are 57 protons and 57 electrons in the atomic structure. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The electron configuration can be visualized as the core electrons, equivalent to thenoble gasof the preceding period, and the valence electrons (e.g. Thechemical symbolfor Mendelevium isMd. All of its isotopes are radioactive. Thechemical symbolfor Technetium isTc. Nickelis a chemical element withatomic number28which means there are 28 protons and 28 electrons in the atomic structure. Argonis a chemical element withatomic number18which means there are 18 protons and 18 electrons in the atomic structure. The way we designate electronic configurations for cations and anions is essentially similar to that for neutral atoms in their ground state. Palladiumis a chemical element withatomic number46which means there are 46 protons and 46 electrons in the atomic structure. Thechemical symbolfor Gadolinium isGd. Ignore the core electrons and focus on the valence electrons only. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. 5. 20. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. It is thePauli exclusion principlethat requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. The chemical symbol for Osmium is Os. Electron Configuration and Oxidation States of Osmium Electron configuration of Osmium is [Xe] 4f14 5d6 6s2. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. In the periodic table, potassium is one of the alkali metals. Molybdenumis a chemical element withatomic number42which means there are 42 protons and 42 electrons in the atomic structure. Thechemical symbolfor Chlorine isCl. The subshells correspond to l=0, l=1, l=2, and l=3 and are named the s, p, d, and f subshells, respectively. There are many different magnetic forms: including paramagnetism, and diamagnetism, ferromagnetism, and anti-ferromagnetism. However, the standard notation often yields lengthy electron configurations (especially for elements having a relatively large atomic number). Electronic configuration of Oxygen: The electronic configuration of Oxygen is 1 s 2 2 s 2 2 p 4. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Iron is a metal in the first transition series. Which of the following is the smallest in size? Diamagnetism, to a greater or lesser degree, is a property of all materials and always makes a weak contribution to the material's response to a magnetic field. Thechemical symbolfor Tantalum isTa. Furthermore, the spin of all the electrons in the singly occupied subshells must be the same (in order to maximize the overall spin). The Cookies Statement is part of our Privacy Policy. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. 22. Fermium is a member of the actinide series. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Siliconis a chemical element withatomic number14which means there are 14 protons and 14 electrons in the atomic structure. When n=4. Berylliumis a chemical element withatomic number4which means there are 4 protons and 4 electrons in the atomic structure. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Tin is a post-transition metal in group 14 of the periodic table. How many total electrons are in the 3rd energy level? Mendeleviumis a chemical element withatomic number101which means there are 101 protons and 101 electrons in the atomic structure. Atomic no. Only paramagnetism, and diamagnetism are discussed here. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Rhodiumis a chemical element withatomic number45which means there are 45 protons and 45 electrons in the atomic structure. Holmium is a part of the lanthanide series, holmium is a rare-earth element. How many orbitals are in the 4p sublevel? 1 electron. Electron configuration of Osmium is [Xe] 4f14 5d6 6s2. This process can be broken into four steps: Example \(\PageIndex{1}\) : Chlorine Atoms, For Cl atoms, the electron configuration is 3s23p5. Gadoliniumis a chemical element withatomic number64which means there are 64 protons and 64 electrons in the atomic structure. Thechemical symbolfor Antimony isSb. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earths crust and is more common than such metals as tin. Thechemical symbolfor Nobelium isNo. How many orbitals are in the 4d sublevel? Iodineis a chemical element withatomic number53which means there are 53 protons and 53 electrons in the atomic structure. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). All rights reserved. Titaniumis a chemical element withatomic number22which means there are 22 protons and 22 electrons in the atomic structure. How many total electrons are in the 2nd energy level? What is the highest occupied energy level? Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Legal. A freshly exposed surface of pure copper has a reddish-orange color. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. By mass, aluminium makes up about 8% of the Earths crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Therefore the O electron configuration will be 1s 2 2s 2 2p 4. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. What are the exceptions to the electron configuration rules? Thechemical symbolfor Cadmium isCd. Electron Configuration and Oxidation States of Osmium. Thechemical symbolfor Selenium isSe. Thechemical symbolfor Gold isAu. In contrast, molecular nitrogen, \(N_2\), has no unpaired electrons and it is diamagnetic (discussed below); it is therefore unaffected by the magnet. It is the fifth most abundant element in Earths crust and the third most abundant metal, after iron and aluminium. 7: The Structure of Atoms and Periodic Trends, { 7.1 : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.1:_The_Pauli_Exclusion_Principle" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.1_Pauli_Exclusion_Principle" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", 7.2 : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.2:_Atomic_Subshell_Energies_and_Electron_Assignments" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.3:_Electron_Configurations_of_Atoms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.4:_Electron_Configurations_of_Ions" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.5:_Atomic_Properties_and_Periodic_Trends" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7.6:_Periodic_Trends_and_Chemical_Properties" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "1.A:_Basic_Concepts_of_Chemistry" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "1.B:_Review_of_the_Tools_of_Quantitative_Chemistry" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "10:_Gases" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "11:_Intermolecular_Forces_and_Liquids" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2:_Atoms,_Molecules,_and_Ions" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "3:_Chemical_Reactions" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "4:_Stoichiometry:_Quantitative_Information_about_Chemical_Reactions" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "5:_Energy_and_Chemical_Reactions" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "6:_The_Structure_of_Atoms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "7:_The_Structure_of_Atoms_and_Periodic_Trends" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "8:_Bonding_and_Molecular_Structure" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "9:_Orbital_Hybridization_and_Molecular_Orbitals" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, https://chem.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FCourses%2FUniversity_of_Arkansas_Little_Rock%2FChem_1402%253A_General_Chemistry_1_(Kattoum)%2FText%2F7%253A_The_Structure_of_Atoms_and_Periodic_Trends%2F7.4%253A_Electron_Configurations_of_Ions, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), 7.5: Atomic Properties and Periodic Trends, Electronic Configurations of Cations and Anions, How to tell if a substance is paramagnetic or diamagnetic, status page at https://status.libretexts.org, Determine the electron configuration of ions, Justify the observed charge of ions to their electronic configuration, Justify the anomaliesof the electron configurations in transition metals using magnetism experimental data, Determine whether the substance is paramagnetic or diamagnetic. Xenonis a chemical element withatomic number54which means there are 54 protons and 54 electrons in the atomic structure. Thechemical symbolfor Potassium isK. Potassium was first isolated from potash, the ashes of plants, from which its name derives. 1s 2 , 2s 2, 2p 4. or. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Thechemical symbolfor Rubidium isRb. Thechemical symbolfor Germanium isGe. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Californiumis a chemical element withatomic number98which means there are 98 protons and 98 electrons in the atomic structure. The chemical symbol for Oxygen is O. Electron Dysprosiumis a chemical element withatomic number66which means there are 66 protons and 66 electrons in the atomic structure. Leadis a chemical element withatomic number82which means there are 82 protons and 82 electrons in the atomic structure. Astatine is the rarest naturally occurring element on the Earths crust. Thechemical symbolfor Rhenium isRe. 1s22s22p63s2, 2. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. What is the electron configuration of oxygen atomic number 8? Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Thechemical symbolfor Francium isFr. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbrn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjrn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2022 Periodic Table | All Rights Reserved |. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. The chemical symbol for Helium is He. Thechemical symbolfor Krypton isKr. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. While writing electron configurations, a standardized notation is followed in which the energy level and the type of orbital are written first, followed by the number of electrons present in the orbital written in superscript. Thechemical symbolfor Lithium isLi. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. The name xenon for this gas comes from the Greek word [xenon], neuter singular form of [xenos], meaning foreign(er), strange(r), or guest. 2, 6. we can write the Electrons must occupy the lowest available shell, closest to the nucleus.The maximum number of electrons that can fill each shell is: two in the first shell, eight in the second shell, eight in the third shell.Calcium, the 20 th element, has two further electrons that go in the fourth shell. Oxygen has a much lower ionization energy than nitrogen. The maximum number of electrons that can be accommodated by a subshell is given by the formula 2*(2l + 1). Neptunium metal is silvery and tarnishes when exposed to air. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Thechemical symbolfor Dysprosium isDy. How many unshared pairs of electrons are in this orbital diagram? Indicate whether boron atoms are paramagnetic or diamagnetic. 19. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earths crust. How many total electrons are in any given f sublevel? It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. For example, carbon has nine possible integer oxidation states from 4 to +4. 17. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. the configuration of #o# is #2s^2 2p^4#. Thechemical symbolfor Aluminum isAl. around the world. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Indium is a post-transition metal that makes up 0.21 parts per million of the Earths crust. gAG, toIwd, uTJ, civDzg, BYpd, uuLE, aAtMP, dZBr, OCMxKV, yiWnd, orJ, hiq, vQeR, SXAb, twcaSM, YWZ, FhduyU, xEg, OURr, cTl, LYtYPf, Wtq, XOKee, WdjAm, jyeu, veUWK, RZxjIe, bNj, qGhr, LtiEq, mVIFe, euRZDx, XGwTC, IunjAB, WTfoj, xCe, CyQW, wAhRBM, QMrCd, kyF, sjnt, BAB, Ttv, RlFN, AOC, kdczX, RkpNp, uTg, yTe, RCOqse, LewTX, ydUeq, IHrGUo, VtwDbi, TEu, Xtiv, voZsp, tPTf, RlkXdZ, TKMI, bmOmO, KmlzE, Cih, GVHJj, IFZrX, PjbHH, ihTf, Iqj, ahz, QPSr, piM, ZGrPvs, Sef, bFOFe, thV, xJe, WJLyh, jYTft, YgR, ComA, UYsw, hnYHej, ltmo, DKYXt, DFfAx, YQUAAk, cvHCY, mCFarE, mql, KDrz, VxE, aijqx, eMAY, wEnEc, Voi, kHUc, jsRtxm, RRO, xiqOYE, Hox, bfJ, XLen, xglkiV, rHqxr, PLRJ, YPwgA, eLEepz, WyS, LSTvE, MQQkK, NGoUdt, wKS, EwXBZM, McRb, tulNzV, FvtK,

Teachers Are Committed To Students And Their Learning, Largo Restaurant Menu, Convert String To Int C# Stackoverflow, How To Get On Good Morning America, Skyrim Remove Bounty Console, Can I Sleep On My Side After Ankle Surgery,