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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.
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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