Which one of the following situations is not ever encountered in the ground state configuration of an atom?

a.. 3d^4 with 4 unpaired electrons

3d^7 with 7 unpaired electrons

3p^1 with 1 unpaired electrons

3d^9 with 1 unpaired electrons

4f^7 with 7 unpaired electrons.

Please explain!!

2 Answers

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  • 8 years ago
    Favorite Answer

    The second one. That would require 7 orbitals and there are only 5 in the d-sub level.

  • Mike A
    Lv 7
    8 years ago

    The second one (3d)7 would have 3 unpaired electrons and two pairs.

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