Which of the following ions has the maximum number of unpaired d- electrons?

  1. A

    Zn2+

  2. B

    Fe2+

  3. C

    Ni3+

  4. D

    Cu+

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    Solution:

    The Correct option is B)

    Fe2+ ion (Z=26) has an electronic configuration [Ar]3d64s0 . It contains 4 unpaired electrons.

    Thus, has the maximum number of unpaired d- electrons.

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