The reason for Chromium to have (Ar)3d54s1 configuration instead of (Ar)3d44S2 due to

  1. A

    Aufbau principle

  2. B

     Paulis exclusion principle

  3. C

    Heisenberg principle

  4. D

    more exchange energy

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    Solution:

    Eex=N(N-1)2 Here N=No.of electrons having parallel spins

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