The valence shell electronic configuration of `Cr^(2+)` ion is

Options

A. `3 p^(2) 4 s^(2)`
B. `4 s^(2) 3 d^(2)`
C. `4 s^(2) 3 d^(0)`
D. `4 s^(0) 3 d^(0)`

Answer

D

Explanation

Electronic configuration of chromium
`Cr rarr [Ar] 3d^(5) 4 s^(0)`
`Cr^(2 +) rarr [Ar] 3d^(4) 4 s^(0)`