Home PYQs UPPSC UPPSC MCQs Prelims 1996 (GS Paper I)

Question

Neutron was discovered by:

  1. Chadwick
  2. Rutherford
  3. Bohr
  4. Newton

Answer:

Option A: Chadwick

Detailed Solution:

The correct answer is “Chadwick”.

British physicist James Chadwick discovered the neutron in 1932. He did this by bombarding a thin sheet of beryllium with alpha particles, which emitted electrically neutral particles with a mass slightly greater than protons.