Iron has the following electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(6). What would be the values for the principal quantum number (n) and the angular momentum quantum number (l) for one of its valence electrons?
b. n=4, and l=2
c. n=4, and l=3
a. n=3, and l=3
d. n=3, and l=2