quantum numbers.

4. Hund's rule: For each of the following atoms, write the four quantum numbers for each valence electron. There are multiple correct answers for some of these. Any correct answer is acceptable (you don't have to write out all of the possible permutations). a. Beryllium, [Be] 2s b. Arsenic, [Ar]4s? 3d104p' (assume that the 4p electrons are the valence electrons) c. Thallium, [Xe] 4f" 5d068Op (assume that the 6s electron is the valence electrons) d. Bonus (not graded): What do these 3 elements have in common