question_answer

For which one of the following, Bohr model is not valid ?                                         [NEET 2020]

A)  Singly ionised helium atom \[\left( H{{e}^{+}} \right)\]

B)  Deuteron atom

C)  Singly ionised neon atom \[\left( N{{e}^{+}} \right)\]

D)  Hydrogen atom Correct Answer: C Solution : [c] Bohr model is only valid for single electron species.

Singly ionised neon atom has more than one electron in orbit. Hence, Bohr model is not valid.