Back to Directory
NEET PHYSICSEasy

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

A

Singly ionised helium atom (He⁺)

B

Deuteron atom

C

Singly ionised neon atom (Ne⁺)

D

Hydrogen atom

Step-by-Step Solution

The Bohr model is applicable only to hydrogen-like species, which contain only one electron (e.g., H, He⁺, Li²⁺, Be³⁺) .

  1. Hydrogen atom: Contains 1 electron (Valid).
  2. Deuteron: Isotope of hydrogen, contains 1 electron (Valid).
  3. Singly ionised helium (He⁺): Atomic number Z=2Z=2. Electrons = 2−1=12-1=1 (Valid) , .
  4. Singly ionised neon (Ne⁺): Atomic number Z=10Z=10. Electrons = 10−1=910-1=9. Since it is a multi-electron system, the Bohr model is not valid , .
Practice Mode Available

Master this Topic on Sushrut

Join thousands of students and practice with AI-generated mock tests.

Get Started
Solved: PHYSICS Question for NEET | Sushrut