Zinc, Cadmium, and Mercury are located in the d-block but are not considered true transition element — d and f Block Elements Chemistry Question

💡 Solution & Explanation

A transition element is defined as one having incompletely filled $d$ -orbitals in its ground state or any stable oxidation state. $Zn$, $Cd$, and $Hg$ have $d^{10}$ configurations in both their ground state and $+2$ state.