Question

out of the following which one exhibit paramagnetic behaviour-- Sc3+ or Ca3+ and why?​

Answer 1

Explanation:

Sc = [Ar] 3d14s2; Sc3+ = [Ar] ; it has no unpaired electron so diamagnetic

Cr = [Ar] 3d54s1; Cr3+ = [Ar]3d3; it has three unpaired electrons paramagnetic