Question

All d-block elements are transition elements.

(a) True

(b) False

The question was asked during an interview.

The origin of the question is Position of the Periodic Table topic in section D and F-Block Elements of Chemistry – Class 12

Answer 1

Right answer is (b) False

The explanation: Scandium and Zinc are d-block elements but are not transition elements. The electronic configurations of Sc and Zn are:

Sc: [Ar] 3d^14s^2

Zn: [Ar] 3d^104s^2

In their ionic form, Sc and Zn lose electrons and attain the configuration of Argon. Hence, they have completely filled d orbitals.