What should be the number of electrons presents in `X^(2+)` on the basis of electronic configuiration if the ion `X^(3+)` has `14` protons ?

Explanation

`X^(3-)` has `14` proton so X also has `14` proton .Therefore it the `14` electron
`X = 14 = 1s^(2) 2s^(2) 2p^(6)3s^(2)3p^(2)`
`X^(2+) = 1s^(2) 2s^(2) 2p^(6)3s^(2) = 12` electrons