Question

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

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

Answer 1

The correct option is A 2 and 0

The number of radial nodes is given by expression $(n-l-1)$
For, $3s$, number of nodes $=3-0-1=2$
For, $2p$, number of nodes $=2-1-1=0$