Enter the electronic configuration for the following ions Rb+,Br-, S2-, Ba2+, Express your answer in the order of orbital filling as a string without blank spaces between orbitals. For example, the electronic configuration for Li could be entered as 1s^22s^1 or [He]2s^1. I asked this before (not here)and got the original electronic configuration and was not correct. please explain how I can figure the out. and wright it out for me. Thank you I always rate!​