To which of the following species, the Bohr theory is not applicable?
A
He
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B
Li2+
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C
He2+
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D
H-atom
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Solution
The correct options are AHe CHe2+ The Bohr theory is not applicable to the species He and He2+ as these are not one electron species. He and He2+ contains 2 and 0 electrons respectively. The Bohr theory is applicable to the species Li2+ and H atom as these are one electron species.