An element (symbol M) has 26 protons in the nucleus. Write the electronic configuration of `M^(2+) annd M^(3+)`.

Explanation

`""_(26)M:1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(6)4s^(2)`
`therefore ""_(26)M^(2+):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(6)`
and `""_(26)M^(3+): 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(5)`.