Which of the following is a diamagnetic ion: (Atomic numbers of Sc, V, Mn and Cu are 21, 23, 25 and 29 respectively)

Options

A. `V^(2+)`
B. `Sc^(3+)`
C. `Cu^(2+)`
D. `Mn^(2+)`

Answer

B

Explanation

`Sc^(3+)` is a diamagneticion Atomid, number is 21
`[Ar]3d^(0)` is `Sc^(3+)` electronic configuration . Since its d subshell is empty it is diamagnetic as it has noble gas configuration.