Question

The number of radial nodes in `3s` and `2p`, respectively, are
A. `0`and`2`
B. `1`and`2`
C. `2`and`0`
D. `2`and`1`

Answer 1

Correct Answer - C
The number of radial nodes or spherical nodes is given by the formula
`n - l-1`
where `n` is principle quantum number and `l` is azimuthal quantum number.
For `3s` orbital, `n - l-1 = 3-0-1=2`
? For `2p` orbital, `n - l - 1=2 - 1- 1=0`