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Question: Answered & Verified by Expert
The simple Bohr model is not applicable to He atom because
PhysicsAtomic Physics
Options:
  • A
    $\mathrm{He}^4$ is an inert gas
  • B
    $\mathrm{He}^4$ has neutrons in the nucleus
  • C
    $\mathrm{He}^4$ has one more electron
  • D
    electrons are not subject to central forces
Solution:
2559 Upvotes Verified Answer
The correct answers are:
$\mathrm{He}^4$ has one more electron
,
electrons are not subject to central forces
Bohr model is valid for $\mathrm{H}$-atom only for one electron but Bohr model is not applicable to $\mathrm{He}^4$ atom because $\mathrm{He}^4$ has one more electron and electrons are not subject to central forces due to longer distance than nuclear size.

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