Question

The number of radial nodes present in 3s and 2p orbitals 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 $(n-l-1)$,
where, $n=$ principal quantum number
$l=$ azimuthal quantum number
$l=0,1,2,3$ for s, p, d, f orbital respectively,

For 3s, number of radial nodes = 3 - 0 - 1 = 2
For 2p, number of radial nodes = 2 - 1 - 1 = 0