Question

Read below given tabular form and answer the questions.

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

Which element has electronic configuration as $n{s}^2$ formula?

Answer 1

The configuration of elements is:

$He=1s^2$ $Kr=4s^{2}4p^6$

$Ne=2s^{2}2p^6$ $Xe=5s^{2}5p^6$

$Ar=3s^{2}3p^6$ $Rn=6s^{2}6p^6$

Therefore, , He(Helium) has electronic configuration as $n{s}^2$ formula while the others have electronic configuration as $n{s}^{2}n{p}^6$ formula