Question

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

(1) 16

(2) 8

(3) 4

(4) 2

Comments

Since n = 4 so l = 0,1,2,3 but m = -2 is not possible in l = 0,1. So number of subshells is 2 i.e. d and f

Answer 1

Ans. (4) 2

Sol. For n = 4 possible values of ℓ = 0, 1, 2, 3 only ℓ = 2 & ℓ = 3 can have m = –2.

So possible subshells are 2.