Which one of the following show highest magnetic moment?

Options

A. `V^(3+)`
B. `Cr^(3+)`
C. `Fe^(3+)`
D. `CO^(3+)`

Answer

C

Explanation

Valence shell electron configuration of `V^(3+) is [Ar]^(18)3d^(2),so n=2`
(B) Valence shell electron configuration of `Cr^(3+) is [Ar]^(18) 3d^(3),so n=3`
(C ) Valence shell electron configuration of `Fe^(3+) is [Ar]^(18) 3d^(5),so n=5`
(D) Valence shell electron configuration of `Co^(3+) is [Ar]^(18) 3d^(6),so n=4`