I think I understand the basics of the electron spin. However, I'm trying to figure out how to tell if, when shooting a beam of atoms (the Stern-Gerlach experiment), how to tell if an element will have some atoms deflecting up and some down? I initially thought to draw out the electron distribution of each possible element (it's a multiple choice question) and then try and figure out which ones were spinning up and which were spinning down. But this doesn't align with the answer to the question. Any guidance would be appreciated?