1.

______ discovered the presence of neutrons inside an atom.1. E. Goldstein2. J. Chadwick3. J. J. Thomson4. Niels Bohr

Answer» Correct Answer - Option 2 : J. Chadwick

Neutrons:

  • A 'Neutron' is a subatomic particle, symbol n or n⁰, which has a neutral charge and a mass slightly greater than that of a proton. 
  • The Neutron is essential to the production of nuclear power.
  • In the decade after the neutron was discovered by James Chadwick in 1932.
  • Protons and Neutrons constitute the nuclei of atoms.

​Thus, J. Chadwick discovered the presence of neutrons inside an atom.

NameDiscoveredYear
Wilhelm RöentgenX-Ray1895
Neils Bohrhydrogen atom structure and its spectrum1913
J J ThomsonElectron1897
James ChadwickNeutron1932
GoldsteinProton1886
John DaltonAtomic Theory1808


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