Question

Reaarangement of the electronic configuration may also take place if there are favourable alternatives. Explain this please.​

Answer 1

$\huge\underline\mathbf\red{ANSWER:}$

yes if we consider chromium or copper which are d- block elements we can observe that the rearrangement of electrons takes place to gain stable configuration..

to gain stable configuration they shift one electron from 4s orbital to 3d.

Hence in favourable conditions the rearrangement of electrons takes place ...