Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

For $\mathrm{n}=4$ possible values of $\mathrm{\ell }=0,1,2,3$ because values $\mathrm{\ell }$ lie between $0 \mathrm{to} \mathrm{n}-1$ 

We have to check values of $\mathrm{m}$ which lie between $-\mathrm{\ell } \mathrm{to}+\mathrm{\ell }$.

$\mathrm{\ell }=2 \& \mathrm{\ell }=3$ can have $\mathrm{m}=-2$ So possible subshells are $2$.