Uh, I know my question seems highly stupid, but I think I somehow confused the cause of spectrum of these things, I don't know why...I'm getting a lot of confusion these days... He I (neutral He) has 2 electrons, thus the emission is caused by both of them or one of them go up and back down, right? He II (Singly ionized He) has 1 electron, but one more electron can come from the outside and then come and get down with the He II atom, then emit light too. I can't tell the difference between the 2 lights emitted...One get up and get down, and one just get down, but so what? they all get down to the same level and emit the same wavelength, or do they? And if so, He II have only 1 electron, but there is another electron ready to come...should the states be singlet and triplet instead of doublet like Hydrogen? Thank you very much.