Chemistry - Atomic Structure Question with Solution | TestHub

Maximum l value should be equal to n−1 and it cannot be equal to n.

$\because$ for $\left(\mathrm{l}\right)$ It can be upto $(\mathrm{n}-1)$ and 

Thus, $\mathrm{m}=\pm \mathrm{l}$ i.e. $+\mathrm{l},0,-\mathrm{l}$

for (a) $\mathrm{n}=2,\mathrm{l}=0,\mathrm{m}=0$ (correct),

for (b) $\mathrm{n}=1,\mathrm{l}=0,\mathrm{m}=0$ (correct),

(c) $\mathrm{n}=3,\mathrm{l}=3$ (not correct),

(d) $\mathrm{n}=2,\mathrm{l}=1,\mathrm{m}=1$ (correct),