Bohr atomic model had successfully explained the origin of hydrogen spectrum and was able to remove the defect of earlier Rutherford atomic model. However, it has the following drawbacks:
1. No explanation for fine structure of spectra:-
When the hydrogen spectrum is observed with the help of spectroscope of high resolving power, it is found that the individual spectral lines are not really single but consists of several very fine lines lying close together. This fine structure of spectral lines in the hydrogen spectrum cannot be explained by Bohr atomic model.
2. No explanation for multi electron system:-
Bohr’s atomic model only explained the origin of spectrum of hydrogen atom and hydrogen likes ion He, Li etc but it did not explain the origin of the spectrum of multi electron system.
3. No explanation for dual nature of electron:-
Bohr’s atomic model has treated electron as particles of certain mass revolving around the nucleus in fixed orbits.
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