Question

The number of radial nodes in $3s$ and $2p$ orbitals respectively are:

• A. 2, 0
• B. 0, 2
• C. 1, 2
• D. 2, 1

Answer 1

The correct option is A 2, 0

The number of radial nodes = $n-l-1$
For $3s,n-l-1=3-0-1=2$, i.e., $2$ radial nodes.
For $2p,n-l-1=2-1-1=0$, i.e., 0 radial nodes.