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

  1. Dec 29, 2013 #1
    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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  3. Dec 29, 2013 #2

    dextercioby

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    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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