Which of the following ions has the highest magnetic moment

Options

A. `Ti^(3+)`
B. `Sc^(3+)`
C. `Mn^(2+)`
D. `Zn^(2+)`

Answer

C

Explanation

`Ti^(3+) to 3d^1 4s^0 , Sc^(3+) to 3d^0 `
`Mn^(2+) to 3d^5 4s^0 , Zn^(2+) to 3d^10 4s^0`
In `Mn^(2+)` number of unpaired d `e^(-) = 5`. So it has maximum magnetic moment according to the formula. `mu = sqrt(n(n+2))`