Question #480b8
1 Answer
the hydrogen atom has all the shells around its nucleus. but only the first energy level holds the electron.
Explanation:
first you should know that there are shells upto the infinite around every atom's nucleus. it's just that the nuclear attraction of a Hydrogen atom (which is 1 proton x charge of a proton) is only able keep one electron in it's shell. which the innermost shell of the atom (n=1)
when you give extra energy to that atom by exposing it to a high voltage, the electron in the ground level (or the ground state electron of Hydrogen) takes that energy as energy packets (photons) to go to higher energy levels. it can go from n=1 to n=2, to n=3, also if given enough energy, it can also go to n =
that is when you get the absorption spectrum.
the following image shows the path of the electrom lower shells to higher levels.

