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Bohr improved the atom model by proposing that electrons revolve in
AStraight lines toward the nucleus
BA plum-pudding of positive matter
CRandom paths inside the nucleus
DFixed energy shells around the nucleus
Answer & Solution
Correct answer: D. Fixed energy shells around the nucleus
1. Rutherford's electron paths would lose energy and crash into the nucleus.
2. Bohr proposed quantised, fixed-energy shells (orbits).
3. Electrons in these shells do not radiate energy.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 8, Ch on Structure of Atom (Mistral OCR'd PDF), section on Bohr's model_
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