Multiple choice

Neutron was discovered by

  1. Chadwick

  2. Rutherford

  3. Bohr

  4. Newton
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A Correct answer
Explanation

James Chadwick discovered the neutron in 1932, completing the picture of atomic structure with protons, neutrons, and electrons. Rutherford had hypothesized a neutral particle in 1920, but Chadwick provided the experimental proof through his bombardment experiments with beryllium. Bohr developed atomic theory models, and Newton predates atomic physics.

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