Question

Which of the following element does not show variable valency.

• A. Ni
• B. Zn
• C. Cu
• D. Mn

Answer 1

Answer: (B)

Zn

Answer 2

The electronic configuration of $Zn$ is $(Ar)3d^{10}4s^{2}$. Hence due to complete d-subshell, it does not show variable valency.