The diamagnetic ion is

Options

A. `V^(2+)`
B. `Cr^(2+)`
C. `Ti^(+3)`
D. `Sc^(3+)`

Answer

D

Explanation

Electronic configuration of ions given are as
`21Sc^(3+), 3d^(@)4s^(@)`
`22Ti^(3+),3d^(1)4S^(@)`
`23V^(2+),3d^(3)4S^(@)`
In `Sc^(3+)` ion, all electrons are paired and hence it diamagnetic.