You see hydrogen electron energy states labeled as 1s1/2, 2s1/2, 2p1/2 and 2p3/2. My confussion may be with understanding the definitions, but does not the 2s1/2 state imply that there are 2 electrons around as the 1st s orbital is filled. But, by definition doesn't that mean you are dealing with h- acid? ie a hydrogen proton with 2 electrons. Same thing with 2p - doesn't it imply a second electron?