Electron Configuration Calculator Added Nov 11, 2014 by Brennenlb in Chemistry Find the Electron configuration of any Element on the Periodic Table of Elements with this simple, yet very useful widget. For example, the electron configuration of lithium, 1s²2s¹, tells us that lithium has two electrons in the 1s subshell and one electron in the 2s subshell. In the third period of the table, the atoms all have a neon-like core of 10 electrons, and shell #3 is occupied progressively with eight electrons, starting with the 3s-orbital. Non-bonding valence electrons are shown as dots. Electron configuration of every element in the periodic table # Element Electron configuration 1 Hydrogen 1s1 2 Helium 1s2 3 Lithium 1s22s1 4 Beryllium 1s22s2 5 Boron 1s22s22p1 6 Carbon 1s 22s22p 7 Nitrogen 1s 22s 2p3 8 Oxygen 1s22s22p4 9 Fluorine 1s22s22p5 10 Neon 1s22s22p6 11 Sodium 1s22s22p63s1 12 Magnesium 1s22s22p63s2 13 Aluminum 1s 22s 2p63s 3p1 14 Silicon … However, the standard notation often yields lengthy electron configurations (especially for elements having a relatively large atomic number). This program determines the information shown below for either an atom or an ion. Have questions or comments? When entering the charge for an ion, it can be entered as +2 or 2+, i.e. For each atom the subshells are given first in concise form, then with all subshells written out, followed by the number of electrons per shell. Strategy: Identify the block in the periodic table to which the group 2 elements belong. Boron compounds such as BH3 and BF3 are exceptional in that conventional covalent bonding does not expand the valence shell occupancy of boron to an octet. Why do the atoms of many elements interact with each other and with other elements to give stable molecules? These formulas are derived from the graphic notations suggested by A. Couper and A. Kekulé, and are not identical to their original drawings. Hassium: Value is a guess based on periodic table trend. Because of their importance in understanding organic chemistry, functional groups have characteristic names that often carry over in the naming of individual compounds incorporating specific groups. There are four distinct rectangular areas or blocks. A dipole exists when the centers of positive and negative charge distribution do not coincide. Bromine is in Group 17, Period 4. An electron configuration table is a type of code that describes how many electrons are in each energy level of an atom and how the electrons are arranged within each energy level. 6.9: Electron Configurations and the Periodic Table, [ "stage:draft", "article:topic", "showtoc:no" ], https://chem.libretexts.org/@app/auth/2/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FCourses%2FHeartland_Community_College%2FHCC%253A_Chem_161%2F6%253A_Electronic_Structure_of_Atoms%2F6.9%253A_Electron_Configurations_and_the_Periodic_Table, GRC Chem 162: General Chemistry II (Lundquist), information contact us at info@libretexts.org, status page at https://status.libretexts.org, To correlate the arrangement of atoms in the periodic table results in blocks corresponding to filling of the. The answer is rather simple, if you understand electron configurations: the shape of the periodic table mimics the filling of the subshells with electrons. - the first letter of an element is capitalized and the second is a small letter. To correlate the arrangement of atoms in the periodic table results in blocks corresponding to filling of the ns, np, nd, and nf orbitals As you have learned, the electron configurations of the elements explain the otherwise peculiar shape of the periodic table. The highest occupied electron shell is called the valence shell, and the electrons occupying this shell are called valence electrons. Replacing one of the hydrogens of water by a more electronegative atom increases the acidity of the remaining O–H bond. If you don’t have a chart, you can still find the electron configuration. Given: series of elements. (colored violet above) are also exceptionally reactive, but for the opposite reason. (Redirected from Atomic electron configuration table) Main article: Electron configuration This page shows the electron configurations of the neutral gaseous atoms in their ground states. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. This periodic table contains each element's atomic number, atomic mass, symbol, name, and electron configuration. (Note that the heavier halogens also have filled (n − 1)d10 subshells, as well as an (n − 2)f14 subshell for Rn; these do not, however, affect their chemistry in any significant way. Hassium: Value is a guess based on periodic table trend. A different attractive interaction between atoms, called covalent bonding, is involved here. Meitnerium: Value is a guess based on periodic table trend. Electron Configurations are an organized means of documenting the placement of electrons based upon the energy levels and orbitals groupings of the periodic table. Asked for: valence electron configurations. Grayed out electron numbers indicate subshells that are filled to their maximum. As you have learned, the electron configurations of the elements explain the otherwise peculiar shape of the periodic table. Meitnerium: Value is a guess based on periodic table trend. In contrast, other gaseous elements exist as diatomic molecules (H2, N2, O2, F2 & Cl2), and all but nitrogen are quite reactive. For example, the two columns on the left, known as the s block, consist of elements in which the ns orbitals are being filled. The number of valence electrons in the atom is The number of valence electrons in the atom is answer choices The truncated periodic table shown above provides the orbital electronic structure for the first eighteen elements (hydrogen through argon). Some dramatic examples of this reactivity are shown in the following equations. For example, the electron configuration of sodium is 1s22s22p63s1. 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