Azimuthal quantum number defines

Azimuthal quantum number defines the spatial distribution of electron cloud and angular mementum. e.g. $$\begin{aligned}& l=0, \\ & l=1, \\ & l=2 \end{aligned}$$s$- subsehll$p-$subshell$d-$subshell Orbital angular momentum of an electron is calculated using the expression. =$\sqrt{l(l+1)} \frac{h}{2 \pi}