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Born.
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Birthday
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Born.
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Born.
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In 1897, Thomson showed that cathode rays were composed of a previously unknown negatively charged particle, and thus is credited with the discovery and identification of the electron.
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In 1909 Millikan began a series of experiments to determine the electric charge carried by a single electron.
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In 1911, although he could not prove that it was positive or negative, he theorized that atoms have their charge concentrated in a very small nucleus, and thereby pioneered the Rutherford model of the atom, through his discovery and interpretation of Rutherford scattering in his gold foil experiment.
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In 1932, Chadwick pursued a line of research that led to his discovery of the neutron.
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Died.
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Death.
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Death
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Death
