Why large number of lines appear in hydrogen spectrum
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Although an atom of hydrogen contains only one electron yet its atomic spectrum consists of a large number of lines which have been grouped into five series i.e. Lyman, Balmer, Paschen, Brackett, and pfund. This may be explained as follows:-
Any given sample of hydrogen gas contains a large number of molecules. When such a sample is heated to a high temperature or an electric discharge is passed , the hydrogen molecules split into hydrogen atoms. The electrons in different hydrogen atoms absorb different amounts of energies and are excited to different energy levels. For example, the electrons in some are excited to second energy level(L), while in others they may be promoted to third(M), fourth(N), fifth(O) energy levels and so on.Since the lifetime of electrons in these excited states in very small, they return by some lower energy level or even to the ground state is one or more jumps.
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Any given sample of hydrogen gas contains a large number of molecules. When such a sample is heated to a high temperature or an electric discharge is passed , the hydrogen molecules split into hydrogen atoms. The electrons in different hydrogen atoms absorb different amounts of energies and are excited to different energy levels. For example, the electrons in some are excited to second energy level(L), while in others they may be promoted to third(M), fourth(N), fifth(O) energy levels and so on.Since the lifetime of electrons in these excited states in very small, they return by some lower energy level or even to the ground state is one or more jumps.
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kavitavinita123:
Nice answer
thank u
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