Give the values of n and ell for an electron in a 4d orbital. n = ell = 16 select the values of mell and ms that are possible for an electron in a 4d orbital. mell = - 4 - 3 - 2 - 1 - 1/2 0 + 1/2 1 2 3 4 ms = - 4 - 3 - 2 - 1 - 1/2 0 + 1/2 1 2 3 4

There are four quantum numbers: n, l, ml and ms. When the orbital is 4d, the 4 is corresponding to n. Thus, n=4. Then, the d corresponds to l = 2. Now, to find the value for ml, take the values of - l to + l. Therefore,

ml = - 2, - 1, 0, 1, 2

Then, ms could only be either + 1 or - 1.