J.J Thomson

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Last updated 5 years ago

Discipline:
Science
Subject:
Chemistry
Grade:
11

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J.J Thomson

Cathode rays are streams of electrons observed in vacuum tubes. J.J Thomson demonstrated that cathode rays could be diverted by a magnetic field, also, that their negative charge was not a separate aspect.

J.J THOMSON

Born December 18, 1856 Died August 30, 1940 Note worthy accomplishments:- Discovery of the electron- Plum Pudding

"To the electron: may it never be of any use!"

Plum Pudding Model

J.J Thomson came up with the Plum Pudding Model 1904. It was arranged shortly after the discovery of the electron but before the detection of the atomic nucleus. The atom is made up of electrons surrounded by an admixture of positive charges to offset the electrons' negative charges. This is related to negatively charged "plums" encircled by positively charged "pudding."

Discovery of the Electron

J.J Thomson discovered the electron in 1897. He did so in a series of expirements constructed to examine the character of electric discharge in a high-vacuum cathode-ray tube. This sort of thing was being done by many scientists at the time.


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