Question

Which of the following have maximum number of unpaired electron?

• A. $N{a}^{+}$
• B. $N^{3-}$
• C. $F{e}^{3+}$
• D. $C{r}^{+}$

Answer 1

Answer: (C), (D)

The correct options are
C $F{e}^{3+}$
D $C{r}^{+}$

no of unpaired electron
$N{a}^{+}=0$
$N^{-3}=0$
$F{e}^{+3}=d^5{s}^0=5$
$C{r}^{+}=d^5{s}^0=5$