The correct statement about probability density
Question:

The correct statement about probability density (except at infinite distance from nucleus) is :

1. It can be zero for $1 s$ orbital

2. It can be negative for $2 p$ orbital

3.  It can be zero for $3 p$ orbital

4.  It can never be zero for $2 s$ orbital

Correct Option: , 3

Solution:

Radial node $=n-l-1$