Well, I have to find the electron configuration of ions. Relatively simple. But since I don't know how to do it, it's hard. I've seen some past chemistry regents electron configurations and that's too complicated for me. I'm talking about e.c. like 2-8-2. That sort of electron configuration. I need help on how to find out the electron configuration of cations and anions. Does it have to do with removing electrons, like from 2-8-2 to 2-8-1. Consider F- or H-. Or H2+. Since my computer can't do this, the -'s and +'s are like subsets. Smaller and on the top right corner. EDIT: How do you tell if the electron configuration represents electrons in an excited state? Like how is 2-7-2 in an excited state? The one less electron?