Question

Read below given tabular form and answer the questions.

Element	Electronic configuration	Element	Electronic configuration
$He$	$1s^2$	$Kr$	$4s^{2}4p^6$
$Ne$	$2s^{2}2p^6$	$Xe$	$5s^{2}5p^6$
$Ar$	$3s^{2}3p^6$	$Rn$	$6s^{2}6p^6$

Why the above elements are inactive in chemical reactions?

Answer 1

All the above elements are inactive in chemical reactions as they have stable and complete outer orbitals. they do not have any vacant orbitals to receive or donate electrons. Therefore, they do not combine with any element.