Question

The number of unpaired electrons in $Ni$ (atomic number $= 28)$ are

• A. 0
• B. 2
• C. 4
• D. 8

Answer 1

Answer: (B)

2

Answer 2

The number of unpaired electrons in $Ni$ (atomic number $=28)$ are $2$. It can be easily concluded from the electronic configuration of $Ni$. Electronic configuration of $Ni =1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{8}$

Orbitals of $Ni$ in $3d$ =