Question

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

• A. $Ti^{3+}$
• B. $Fe^{3+}$
• C. $Ni^{2+}$
• D. $Cr^{3+}$

Answer 1

Answer: (C)

$Ni^{2+}$

Answer 2

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