Write down the subshell electronic configuration of the elements given below and complete the table.

Element	Number of electrons	Subshell electronic configuration
${}_7\mathrm{N}$	$7$	$1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^3$
${}_9\mathrm{F}$	$9$	$1{\mathrm{s}}^{...}2{\mathrm{s}}^{...}2{\mathrm{p}}^{...}$
${}_{11}\mathrm{Na}$	-	$1{\mathrm{s}}^{...}2{\mathrm{s}}^{...}2{\mathrm{p}}^{...}3{\mathrm{s}}^{...}$
${}_{13}\mathrm{Al}$	-	$1{\mathrm{s}}^{...}2{\mathrm{s}}^{...}2{\mathrm{p}}^{...}3{\mathrm{s}}^{...}3{\mathrm{p}}^{...}$
${}_{17}\mathrm{Cl}$	-	-
${}_{18}\mathrm{Ar}$	-	-