Which set of quantum numbers is allowed?

Question

Which set of quantum numbers is allowed?

	n	l	ml	ms
A)	3	3	3	+1
B)	1	2	–1	+1/2
C)	2	1	2	–1/2
D)	4	0	1	+1/2
E)	4	3	–3	–1/2

Answer 1

A is not allowed because you cannot have l = 3 when n = 3

B is not allowed because you cannot have l = 2 when n = 1

C is not allowed because you cannot have ml = 2 when l = 1 (ml goes from -l to +l)

D is not allowed because you cannot have ml = 1 when l = 0

E is allowed. This describes a 4f electron with a -1/2 spin