J.J. Thompson

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General Information

  • Born Decemeber 18, 1856 in Manchester, United Kingdom.
  • British physicist
  • Cathode rays was made of unknown negative charged particles or electrons.
  • Credited for the findings of isotopes
  • 1906 won nobel prize for discovery of electrons and working with chemical gases.
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  • Test cathode rays
  • Produced them inside a tube on the left past threw the anode into the main bell jar where they were defected by magnet.
  • Support that cathode rays was electrically charged.

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  • As the cathode rays carried a charge of negative electricity they are deflected by an electrostatic force as if they were negatively electrified.
  • He believed they emerged from the molecules of gas in the vicinity of the cathode.