Question

Which of the following ion contains 4 unpaired electrons ?

• A. $N{i}^{2+}$
• B. $F{e}^{2+}$
  
• C. $C{o}^{2+}$
• D. $F{e}^{3+}$

Answer 1

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


Explanation : $N{i}^{2+}(z=28)$