Which of the following element does not show variable valency?

Question

Which of the following element does not show variable valency? (A) Ni (B) Zn (C) Cu (D) Mn

Tardigrade Admin · Accepted Answer

The electronic configuration of Zn is [Ar] 3d10,4s2 . Hence, due to complete d- subshell, it does not show variable valency. It shows only +2 valency.

Q. Which of the following element does not show variable valency?

Ni

Zn

Cu

Mn

The electronic configuration of Zn is [Ar] $3 d^{10}, 4 s^{2}$ . Hence, due to complete d- subshell, it does not show variable valency. It shows only +2 valency.