Question

for which of the follwing species is borh's theory is not applicable

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 Li2+ 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.

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Answer 2

Answer:

species other than hyrogen like atom

for nitrogen oxygen etc. bohr theory is not applicable as these have multiple electron system