Question

The lanthanides are d-block elements.

(a) True

(b) False

I have been asked this question by my college professor while I was bunking the class.

Query is from D and F-Block Elements in section D and F-Block Elements of Chemistry – Class 12

Answer 1

The correct choice is (b) False

Easiest explanation: The lanthanides are elements in which the differentiating electron enters (n-2)f-orbital of anti-penultimate shell and are called as f-block elements. These have three outer shells incomplete. Thus, lanthanides are f-block elements, not d-block.