Question

Which of the following ions has the same number of unpaired electrons as those present in $V^{3+}$?

• A. $T{i}^{3+}$
• B. $F{e}^{3+}$
• C. $N{i}^{2+}$
• D. $C{r}^{3+}$
• E. $M{n}^{2+}$

Answer 1

Answer: (C)

$V^{3+}$ has $3d^2$ outer electronic configuration with 2 unpaired electrons. $N{i}^{2+}$ has $3d^8$ outer electronic configuration with 2 unpaired electrons. Thus, $V^{3+}$ and $N{i}^{2+}$ have same number of unpaired electrons.