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1. elctron in an hydrogen atom revolve around the nucleus in a fixed circular orbit called 'stationary state'
2. electron doesn't loss energy with time to time
3.electron jumps from one stationary state to otherr
4 absorbtion of energy takes place when electrons jumps from lower stationary state to higher
5.emission of energy takes place when e- jumps frm higher stationary state to lower
6. the total transision of energy is given as  Δ e= e2-e1
                                                  where e2 is final orbital energy and e1 in initial orbital energy
7. the frequency of the radiation is given as nue = hc

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if my answer helps plz mark it as brainliest

only certain special orbits known as discrete orbits of electrons are allowed inside the atom

while revolving the electrons do not radiate energy

these shells are called energy levels

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