emission spectrum15分

1. i dunno exactly know the answer, but i guess the lines in line spectrum would be at a closer distance than hydrogen and the number of lines obtained would be more, as the energy levels between successive levels ar closer and He+ has only 1 electron but 2 proton, the effective nuclear charge is higher than that of hydrogen, it is also harder to remove the electron from He+, so there would be more energy levels available, so the spectrum has more lines.
i think for C^5+, the lones would be much more closer than any of the above two, reason is again the same as the above. it is only my guess, i hope i am right

2. the spectrum consists of discrete lines as only certain energy levels ar possible within a hydrogen atom and the lones ar due to electronic transitions from one of these possible higher energy levels to lower energy levels.(for this question, i know the answer exactly)