Question

Which of the following ion is diamagnetic?

Options

• Sc³⁺

• Co²⁺

• Ni²⁺

• Mn²⁺

Answer 1

Sc³⁺

Explanation:

\[\ce{Sc^{3+} -> [Ar] 3d^0}\]

It is because of the lack of unpaired electrons that it is diamagnetic.