Question

Which of the following has maximum no. of unpaired $e^{-}$

• A. $Zn$
• B. $F{e}^{3+}$
• C. $N{i}^{3+}$
• D. $C{u}^{+}$

Answer 1

The correct option is B $F{e}^{3+}$

$F{e}^{3+}\Rightarrow 3d54s^{\circ }\Rightarrow 5$ unpaired electron