As, we know, For 2s orbital, n=2,I=0 Angular node (l)=0 Radial nodes =n−1−1Rightarrow2−0−1=1 For 2p orbital, n=2 and I=1 Angular node (l)=1 Therefore, number of radial nodes =2−1−1=0 It has one angular and zero radial node.
For 3p orbital, n=3,I=1 Angular node (l)=1 It has one angular and one radial node. For 3s orbital, n=3,I=0 No. of angular node (l)=0 No. of radial node Rightarrown−I−1 =3−0−1=2=2 Hence, for 3 s-orbital has no angular node and 2 radial nodes.