The document discusses quantum numbers which describe the specific properties of an electron in an atom. The principal quantum number n defines the shell and subshell of the electron. The angular momentum quantum number l defines the subshell type (s, p, d, f etc). The magnetic quantum number ml indicates the specific orbital within a subshell that the electron occupies.

1. Quantum Numbers
principle quantum number n
n
angular momentum quantum number l
n l
n-1 n
l 2 1 0 l n=3 1 0 l n=2 0 l n=1
L 0 1 2 3 4 5
Name of orbital s p d F g H
P p l=1 s l=0 small letters
s = sharp
p = principle
d = diffuse
f = fundamental
g, h, i, j, k, …
n= sub shells l shell
2p 2s 2
s 0
l=2 d p nodal plane
l=3 f
The magnetic quantum number ml
l
l=1 ml 0 s l=0 2l+1 l
ml 2(2) +1 = 5 d l=2 ml 2(1) +1 = 3 p
The spin quantum number ms
clockwise
ms counterclockwise