similar exceptions are found for mo cu and ag

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Unformatted text preview: d for Mo, Cu, and Ag Electron configurations and the periodic table The e- configuration of an atom is easily ascertained from its position in the periodic table. Elements with the same pattern of valence electron configuration are in the same group. E.g., elements in gr. 2A all have ns2 outer configurations. Be [He] 2s2 Mg [Ne] 3s2 Ca [Ar] 4s2 Sr [Kr] 5s2 By having a sound knowledge of how the periodic table is divided up, one can write the e- configuration for any atom without even using its atomic number!! 11 05-Sep-13 Subshell filling order and the periodic table • Notice the order of subshell filling matches the order of the subshell blocks on the periodic table, if the fill occurs in the order of increasing atomic numbers. Examples. Write the electron configurations or identify element for the following atoms: Co (Z = 27) Te (Z = 52) Bi (Z = 83) [Ne] 3s2 3p1 [Kr] 5s2 4d 10 5p4 12 05-Sep-13 Two elements are in the same column of the periodic table, one above the other. The ground-state atom of one element h...
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This document was uploaded on 02/18/2014.

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