Question

Which of the following has maximum unpaired d electrons?

• A. $Z{n}^{2+}$
• B. $F{e}^{2+}$
• C. $N{i}^{2+}$
• D. $C{u}^{+}$

Answer 1

The correct option is B $F{e}^{2+}$

$F{e}^{2+}$ has maximum unpaired d electrons of $4$ . $Z{n}^{2+}$ has no unpaired electrons.. $N{i}^{2+}$ has 2 unpaired electron and $C{u}^{2+}$ has two electrons.