Which of the following has maximum number of unpaired electrons?

Options

A. `Mg^(2+)`
B. `Ti^(3+)`
C. `V^(3+)`
D. `Fe^(3+)`

Answer

D

Explanation

`Fe^(3+)` has `3d^5` configuration and, therefore, has 5 (maximum) number of electrons while `Mg^(2+)` has zero, `Ti^(3+)` has `1(3d^1) and V^(3+)` has `2(3d^2)`.