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How did JJ Thomson discover electrons?
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Apr 25, 2024 · At the Cavendish Laboratory at the University of Cambridge, Thomson conducted a series of experiments using cathode ray tubes, which are glass tubes evacuated of air and fitted with two electrodes to emit rays from the cathode (negative electrode) to the anode (positive electrode).
Apr 25, 2024 · Most people regard the identification of cathode rays as electrons as J.J. Thomson’s greatest achievement. This discovery opened the field of subatomic physics to experimental investigation and moved science much closer to understanding the inner workings of the atom.
3 days ago · J. J. Thomson showed that cathode rays are made up of electrons, and he came up with the now very famous plum pudding model. Robert A. Millikan is credited with determining the charge of the electron when he conducted oil drop experiments with Harvey Fletcher.
3 days ago · In 1897, the British physicist J. J. Thomson, with his colleagues John S. Townsend and H. A. Wilson, performed experiments indicating that cathode rays really were unique particles, rather than waves, atoms or molecules as was believed earlier.
- stable ( > 6.6×10²⁸ yr)
- J. J. Thomson (1897)
- e−, β−
- −1 e, −1.602176634×10−19 C
21 hours ago · The Crookes tube turned out to be a very important device to 19th century scientists as it was used both in the discovery of electrons and x-rays. It was used by Johann Hittorf, Heinrich Hertz, Eugene Goldstein, and Philipp Lenard to investigate the properties of the cathode rays, culminating in the 1897 discovery of the electron by J.J. Thomson.
May 12, 2024 · JJ Thomson and Ernst Rutherford proved that the atom is divisible by their discovery of the electron and the nucleus. So, how did Rutherford discover the nucleus? By alpha scattering experiment, popularly known as the gold foil experiment.
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