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Why isn't chromium's electron configuration 2, 8, 12, 2?

by JoshuaFarrell
Tags: atoms, chemistry, chromium, configuration, electron
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JoshuaFarrell
#1
Dec29-13, 02:21 PM
P: 9
Its actual electron configuration is 2, 8, 13, 1 even though Vanadium's electron configuration is 2, 8, 11, 2 and Manganese's is 2, 8, 13, 2.
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dextercioby
#2
Dec29-13, 05:12 PM
Sci Advisor
HW Helper
P: 11,927
It has to do with the 3 Hund's rules and the fact that 5 electrons in all 5 d orbitals form a lower energy configuration. The same happens with 10 electrons and the configuration of Copper.


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