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NDA 2025
Exam
NDA
Year
2025
Subject
General Ability
Chapter
General Science

NDA 2025 · General Ability · General Science

Which one of the following particles in the nucleus of an atom was...

Which one of the following particles in the nucleus of an atom was discovered by J. Chadwick?

Options

  1. AElectron
  2. BProton
  3. CPositron
  4. DNeutron

Correct answer

D. Neutron

Step-by-step solution

James Chadwick discovered the neutron in 1932 by bombarding a thin sheet of beryllium with alpha particles.

The neutron is a neutral subatomic particle present in the nucleus of an atom.

Answer: Neutron
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