Among the following ions, which one will have the highest paramagnetic behaviour?

Options

A. `Co^(3+)`
B. `Cu^(2+)`
C. `Cr^(3+)`
D. `Fe^(3+)`

Answer

D

Explanation

Out of `Co^(3+), Cu^(2+), Cr^(3+) and Fe^(3+), Fe^(3+)` has the maximum number of unpaired electrons.
(Five unpaired electrons).