Question

Write the electronic configurations of the following ions.
(i). `Mn^(2+)`
(ii). `Fe^(3+)`
(iii) `Ni^(2+)` ltBrgt (iv). `Cr^(3+)`.

Answer 1

(i) `[Ar]3d^(5)4s^(0)`
(ii) `[Ar]3d^(5)4s^(0)`
(iii) `[Ar]3d^(8)4s^(0)`
(iv) `[Ar]3d^(3)4s^(0)`.