Question

The number of unpaired electron in Ni2+ is ?

• A. Zero
• B. 2
• C. 4
• D. 8

Answer 1

Answer: (B)

2

Answer 2

Ni (Z = 28) : $[Ar]^{18}.4s^2 \,3d^8$ $Ni^{2+} : [Ar]^{18} \, 3d^6$ Number of unpaired electrons =2.