Question

The difference in number of angular nodes and the number of radial nodes in the orbital to which the last electron of chromium present is ______.

Answer 1

Chromium las electron presents in 3d-orbital for which $l=2$.

So, no. of radial node $=n-l-1$

$=3-2-1=0$

and no. of angular node $=l=2$

Therefore, the difference in number of angular nodes and the number of radial nodes is $2$.