a. An atomic orbital has `n=3`. What are the possible values of `l` and `m`?
b. List the quantum numbers `(m and l)` of electrons for `3d` orbital.
c. Which of the following orbitals are possible" `1p, 2s, 2p,` and `3f`?

Explanation

(i) For n = 3, l=0, a and 2.
For l = 0 , `m_(l)=0`
For l=l , `m_(l) = +1, 0, -1`
For l = 2 , `m_(1) = +2, +1, 0, +1, +2`
(ii) For an electron in 3rd orbital `, n = 3, l = 2 , m_(l) ` can have any of the values -2, -1, 0, +1, +2`.
(iii) 1p and 3 f orbitals are not possible.