The number of unpaired electrons in gaseous species of `Mn^(3+), Cr^(3+)` and `V^(3+)` respectively are………….and most stable species is…………..

Options

A. 4, 3 and 2 and `V^(3+)` is most stable
B. 3, 3 and 2 and `Cr^(3+)` is most stable
C. 4, 3 and 2 and `Cr^(3+)` is most stable
D. 3, 3 and 3 and `Mn^(3+)` is most stable

Answer

C

Explanation

Fully filled or half-filled structure favours stability.
`Mn^(3+) = [Ar]3d^4`

No. of unpaired electrons = 2
`Cr^(3+)` is most stable species.