Electronic configuration of Mn 3+ ion??! HELP!?

Easy 10 points. Tried everything but can’t figure this out! I tried [Ar] 4s2 3d2 but it’s saying wrong answer.

3 Answers

  • The electronic configuration of Mn is: [Ar] 4s2 3d5

    When the Mn atom loses electrons to form an ion, the 4s2 electrons go first, so:

    Mn2+ would have a configuration of [Ar] 3d5.

    The 3d electrons go next, so Mn3+ would have a configuration of [Ar] 3d4.

  • For Mn it is [Ar] 4s2 3d5

    For Mn 3+ ion, it could be [Ar] 3d4 , because it has 3 electrons less.


    for mastering chemistry

    this is the long hand configuration –


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