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