Question

What sub shells are possible in n=3 energy level?

Answer 1

if n= 3 then ,
l = 0,1,2
m= +_1 ,+_ 2 ,0
s= +_1/2

Answer 2

Sub shells in n = 3 means

In M shell,
There are 3 subshells s,p,d.

hope this may help you.
Asking questions is a sign of intelligency.