1.

What is the electronic configuration of Mn^(2+)

Answer»

`[Ne]3d^(5)4S^(0)`
`[Ar]3d^(5)4s^(2)`
`[Ar]3d^(5)4s^(0)`
`[Ne]3d^(5)4s^(2)`

Solution :ELECTRONIC configuration of Mn(25) is
`1s^(2)2s^(2)2p^(6)3S^(2)3p^(6)4s^(2)3d^(5)`
`therefore"Electronic configuration of Mn"^(2+)` is
`1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(0)3d^(5)`

`therefore [Ar]3d^(5)4s^(0).`


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