Question

write down the limitations of Bohr atomic model​

Answer 1

Answer:

The Bohr Model is very limited in terms of size. Poor spectral predictions are obtained when larger atoms are in question. It cannot predict the relative intensities of spectral lines. It does not explain the Zeeman Effect, when the spectral line is split into several components in the presence of a magnetic field.

Answer 2

Limitations of Bohr model

1. Bohr successfully explained the formation of spectra of one electron species like $\sf H , He^{ + } , Li^{ 2 + }$.but failed to explain the spectra of multi electron species such as He, Li, Be, B.

2. Bohr's theory could not explain the effect of magnetic field (Zeeman effect) and electric field (stark effect) on the spectra of atoms.

3. He could not explain why the angular momentum of an electron is quantised.

4. He also failed to explain the splitting of spectral lines, when observed with a spectrometer of high resolving power.

5. Bohr's model of electronic structure could not account for the ability of atoms to form molecules through chemical bonds.

6. We no longer believe in well-defined electron orbits as was assumed by Bohr. In fact, in view of modern advances, like dual nature of matter, uncertainty principle, any mechanical model of the atom stands rejected.

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