Electron was discovered by _________.

  1. Albert Einstein
  2. J. J. Thomson
  3. E. Rutherford
  4. James Chadwick

Answer (Detailed Solution Below)

Option 2 : J. J. Thomson
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Detailed Solution

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CONCEPT:

  • The discovery of the electron is credited to J J Thomson.
  • Electron is a negatively charged particle.
  • The below table shows the discovery of other subatomic particles also:
  Discoverer Year of Discovery
Proton E. Rutherford 1909
Neutron James Chadwick 1932
Electron J.J. Thomson 1897

EXPLANATION:

  • The discovery of the electron is credited to J J Thomson.
  • The scientist searched cathode rays for the carrier of the electrical properties in the matter which leads to the discovery of the electron particles.
  • So the correct answer is option 2.
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