Question

 For which one of the following, Bohr model is not valid?

A Hydrogen atom
B Singly ionised helium atom \(\left(H e^{+}\right)\)
C Deuteron atom
(D) Singly ionised neon atom \(\left(N e^{+}\right)\)

Answer 1

Bohr model is applicable for only single electron species. Singly ionised neon atom has more than one electron in orbit. Hence, Bohr model is not valid

Answer 2

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