Which one of the following sets of quantum numbers could be
those of the distinguishing (last) electron of Mo?
a) n = 4, l= 0, ml= 0, ms= +1/2
(b) n = 5,l= 1, ml= 9, ms= -1/2
(c) n = 4,l= 2, ml= -1, ms= +1/2
(d) n = 5,l= 2, ml= +2, ms= -1/2
(e) n = 3,l= 2, ml= 0, ms= +1/2
I KNOW THE ANSWER IS C BUT PLEASE EXPLAIN WHY THAT IS THE ANSWER
AND...