Question

limitations of Bhors model of atom

Answer 1

Bohr's biggest contribution in his model was to introduce quantum principles to classical physics. limitations of Bohr's atomic model are as follows:-
(1)spectra of large atoms
*the Bohr model could only successful ly explain the spectra of hydrogen atom
* it could not accurately calculate the spectral lines of larger atoms.
*the model only worked for hydrogen like atom that is the atom which only has one electron
(2)zeemen effect
*It was found that, when hydrogen gas was excited in a magnetic field, the produced emission spectrum was split.
*Bohr's model could not account for thisSolved by accounting for the existence of a tiny magnetic moment of each electron.

Answer 2

Limitations of Bohr's model of atom are :-

1. It violets Heisenberg's uncertainty principle. It tells that electrons have both known radius and orbit i.e both known position and momentum at the same time, and that is not possible according to Heisenberg.
2. Bohr's model made correct predictions for smaller atoms like hydrogen but it was not suitable for larger atoms. It was limited for smaller atoms only and was not able to predict larger atoms.
3. It failed to explain the Zeeman effect when the spectral lines is split into several components in the presence of a magnetic field.
4. it failed to explain the Stark effect when the spectral lines gets split up into the fine lines in the presence of electric field.