Name a dipositive metal ion with configuration : `1s^(2) 2s^(2)2p^(6)3s^(2)3p^(6)3d^(5)`

Explanation

The configuration of ion `M^(2+) : 1s^(2)2s^(2)*2p^(6)3s^(2)3p^(6)3d^(5)`.
`" " darr + 2e^(-)`
The configuration of atom (M) `: 1s^(2)*2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(5)`
The atom represent manganese (Mn) and the dipositive ion is `Mn^(2+)ion`.