Question

Write limitations of Bohr's atomic model.
​

Answer 1

Answer:

The Bohr's atom model is applicable only to species having one electron such as hydrogen, Li2+ etc and not applicable to multi – electron atoms. It was unable to explain the splitting of spectral lines in the presence of magnetic field (Zeeman effect) or an electric field (Stark effect).

Answer 2

Explanation:

Some of the drawback of Bohr’s atomic theory are as follows:

1. Bohr treated electrons as particles where according to de Broglie's hypothesis, having a very low mass, electron also exhibits wave nature.

2. Bohr's model was adequate only for nucleus having only one electron e.g. Hydrogen, He+1, Li+2 etc. Bohr's model could not explain the spectra of multi-electronic atoms.

3. Bohr's model was two-dimensional where an atom is three-dimensional.

4. Using a better spectrometer, the spectra showed very fine lines. Bohr's model could not explain the origin of those fine lines. (Solved by Arthur Sommerfield who imagined electrons orbiting in different planes and having elliptical orbits.)

5. Bohr's model could not explain the effect electric field and magnetic field on spectra. (Stark effect and Zeeman effect)