Question

What were the drawbacks of Bohr's atomic model? Explain.

Answer 1

The bohrs model could not explain the formation of spectrum other than hydrogen.

It could not explain the the stark and zeeman effect.

He considered electrons as particles but according to de-broglie concept electrons were not particles.

It could not account for the spectrum lines.

It cannot predict the relative intensities of spectral lines.

Answer 2

Limitations of Bohr' s Model:
1. Bohr's theory fails to explain the spectra of multielectron atoms.
2.It could not explain the fine structure of atomic spectrum obtained by a spectroscope of high resolving power.
3. It does not explain the splitting of spectral lines into a group of finer lines under the influence of magnetic field ( Zeeman effect) and electric field ( Stark effect).
4. Bohr' s theory predicts definite orbits for revolving electrons. It is against the wave nature of electrons.
5. Bohr' s theory is not in agreement with Heisenberg 's uncertainty principle.