(a) An atomic orbital has n=3. What are the possible values of l?
(b) An atomic orbital has l=3. What are the possible values of m?
(c ) An atomic orbital has n=2. What are the possible values of l and m?

Explanation

(a) When n=3 the possible values of l will be between 0 and 2. Therefore, the possible values of l will be 0,1 and 2.
(b) When l=3, the possible values of m are -3,-2,-1,0,+1, +2 and +3.
(c ) When n=2the possible values of l are 0 and 1 while those of m are -1, 0, +1.