

Sir Joseph John "J. J." Thomson, OM, FRS (18 December 1856 – 30 August 1940) was a British physicist and Nobel laureate. He is credited for the discovery of the electron and of isotopes, and the invention of the mass spectrometer. Thomson was awarded the 1906 Nobel Prize in Physics "in recognition of the great merits of his theoretical and experimental investigations on the conduction of electricity by gases".
1856 |
December 18, 1856
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Cheetham Hill, Manchester, England, United Kingdom
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1892 |
May 3, 1892
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Cambridge, Cambridgeshire, United Kingdom
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1940 |
August 30, 1940
Age 83
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Cambridge, Cambridgeshire, England, United Kingdom
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