### 1D.23

Posted: **Sun Nov 03, 2019 1:18 pm**

by **Kimberly Koo 2I**

The question asks, how many orbitals can have the following quantum numbers in an atom? a) n=3, l=1, b) n=5, l=3, ml=-1, c) n=2, l=1, ml=0, d) n=7. I'm not sure how to find these answers, could someone please explain? Thank you!

### Re: 1D.23

Posted: **Sun Nov 03, 2019 1:27 pm**

by **KeyaV1C**

A) N=3, L=1 corresponds with 3p => 3 orbitals

B) corresponds with 5d, ml= -1 => 1 orbital (even though d has 5 orbitals only one of them has ml=-1)

C) 2p, ml=0 => 1 orbital

D) n=2 (is the actual question in the book) => s or p => 1+3 = 4 orbitals

Hope that helps!