Transition elements are d-block elements, with some exceptions. Usually they are paramagnetic. They show variable oxidation states. They and their compounds show catalytic property Zn (atomic number 30) is not a transition element, though it is a d-block element. Why?

Explanation

The electronic.configuration of Zn is `[Ar]3d^10 4s^2` . It has completely filledW- orbitals in its ground state and in its oxidation state of `+2`. So it is not considered as a transition element.