jan 1, 1904 - J. J. Thomson

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-1856 - 1940, U.K.
-1904, Atoms consist of a large sphere of uniform positive charge embedded with smaller negatively charged particles (corpuscles). The total positive charge of the sphere equals the total negative charge of the corpuscles.
-Experiments with cathode ray (Crookes) tubes showed that: 'canal rays' (positive charge) were different when different gases were used; 'cathode rays' (negative charge) were always identical regardless of the nature of the electrodes or gas used.

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