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rpp2010-rev-elements-electronic-struct

rpp2010-rev-elements-electronic-struct - 5 Electronic...

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5. Electronic structure of the elements 1 5. ELECTRONIC STRUCTURE OF THE ELEMENTS Table 5.1. Reviewed 2005 by C.G. Wohl (LBNL). The electronic configurations and the ionization energies are from the NIST database, “Ground Levels and Ionization Energies for the Neutral Atoms,” W.C. Martin, A. Musgrove, S. Kotochigova, and J.E. Sansonetti (2003), http://physics.nist.gov (select “Physical Reference Data”). The electron configuration for, say, iron indicates an argon electronic core (see argon) plus six 3 d electrons and two 4 s electrons. The ionization energy is the least energy necessary to remove to infinity one electron from an atom of the element. Ground Ionization Electron configuration state energy Element (3 d 5 = five 3 d electrons, etc. ) 2 S +1 L J (eV) 1 H Hydrogen 1 s 2 S 1 / 2 13.5984 2 He Helium 1 s 2 1 S 0 24.5874 3 Li Lithium (He)2 s 2 S 1 / 2 5.3917 4 Be Beryllium (He)2 s 2 1 S 0 9.3227 5 B Boron (He)2 s 2 2 p 2 P 1 / 2 8.2980 6 C Carbon (He)2 s 2 2 p 2 3 P 0 11.2603 7 N Nitrogen (He)2 s 2 2 p 3 4 S 3 / 2 14.5341 8 O Oxygen (He)2 s 2 2 p 4 3 P 2 13.6181 9 F Fluorine (He)2 s 2 2 p 5 2 P 3 / 2 17.4228 10 Ne Neon (He)2 s 2 2 p 6 1 S 0 21.5645 11 Na Sodium (Ne)3 s 2 S 1 / 2 5.1391 12 Mg Magnesium (Ne)3 s 2 1 S 0 7.6462 13 Al Aluminum (Ne)3 s 2 3 p 2 P 1 / 2 5.9858 14 Si Silicon (Ne)3 s 2 3 p 2 3 P 0 8.1517 15 P Phosphorus (Ne)3 s 2 3 p 3 4 S 3 / 2 10.4867 16 S Sulfur (Ne)3 s 2 3 p 4 3 P 2 10.3600 17 Cl
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