Question

Zn, Cd and Hg are not regarded as transition elements. Give reason.

Answer 1

Transition elements are characterized by partially filled (n-1) d subshells.
Zn, Cd and Hg are not regarded as transition elements as they have completely filled (n-1)d subshell.
The electronic configuration of zinc is $\left[Ar\right]3d^{10}4s^2$.
The electronic configuration of cadmium is $\left[Kr\right]4d^{10}5s^2$.
The electronic configuration of mercury is $\left[Xe\right]5d^{10}6s^2$.