Question

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

• A. $2$ and $0$
• B. $1$ and $2$
• C. $0$ and $2$
• D. none of these

Answer 1

The correct option is A $2$ and $0$

The correct answer is A.

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$=2-1-1=0$.