Question

For which of the following species, Bohr's atomic
model is not applicable?
7412
Het
747
H+​

Answer 1

Answer:

One of the limitations of Bohr's atomic model is that it does not explain the spectra of multi-electron atoms. All these species like H,He +

and Li 2+ are isoelectronic and have only one electron. Their electronic configurations are same and so their spectra is explained by Bohr's atomic model. But H- has 2 electrons.