Question

The answer to each question of this set is a single digit integer, ranging from 0 to 9:

The number of radial nodes in 3d orbitals will be .....

Answer 1

Number of radial nodes:
$=n-l-1$
n is number of shell
L is the valuue of subshell for d orbital it is 2
so the number of radial nodes are
$=3-2-1=0$
So there were no radial nodes for $3d$ orbital.