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Neutron was discovered by:

  1. Rutherford
  2. Langmuir
  3. Chadwick
  4. Austin

Answer (Detailed Solution Below)

Option 3 : Chadwick
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Detailed Solution

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Concept:

  • The electrons, protons, and neutrons are the three main fundamental particles of an atom of a molecule. 

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  • In the nucleus of an atom, there are protons and neutrons.
  • The electrons revolve around the nucleus of the atom.

The number of protons = Atomic number of an element.

Nuclei = neutron + proton

Explanation:

  • The neutron was discovered by Chadwick in February 1932.
  • The electron was discovered by J.J. Thomson in 1897.
  • The proton was discovered by Ernest Rutherford in 1920.
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