The number of subshells associated with n=4 and m=-2 quantum numbers is :
Question:

The number of subshells associated with $n=4$ and $m=-2$ quantum numbers is :

1. 8

2. 2

3. 16

4. 4

Correct Option: , 2

Solution:

For $n=4$ possible values of $l=0,1,2,3$; only $l=2$ and $l=3$ can have $m=-2 .$ So possible subshells are $2 .$