By signing in you confirm you are 18 or older, or have your parent’s or guardian’s consent.

NDA 1 2025 GAT, question 73

Topic: Chemistry

Q73

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

  1. (a) Electron
  2. (b) Proton
  3. (c) Positron
  4. (d) NeutronCorrect answer

Solution.

Answer: (d) Neutron

  1. James Chadwick discovered the neutron in 1932.
  2. Its lack of electric charge explained why it was more difficult to detect than charged particles and helped account for nuclear mass.