Explain why the quantum number set (3, 3, - 2, + ½) is not possible for an electron in a ground-state atom.

L = an integer from 0 to n-1

mL = an integer from - L to + L

ms = + or - 1/2

the format is (n, L, mL, ms)

so your

n = 3 ... this is OK

L = 2 ... also OK ... if n=3, L can = 0, 1, or 2

mL = - 3 is NOT ok ... if L=2 ... mL can only be - 2, - 1, 0, + 1, or + 2

ms = + 1/2