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400 b.c. He was a greek god that knew about the atomic theory even though it didnt get popular John Dalton.
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His was the atomic theory
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Maxwell's development of the electromagnetic theory of light.
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Discovery of the periodic law and his periodic table of the elements.
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Discovered the electron.
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Bohr discovered that atoms contain of a nucleus at the centre that is surrounded with electron shells, which are made up of the electrons that orbit the nucleus at different levels.
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Discovered the electron in a series of experiments designed to study the nature of electric discharge in a high-vacuum cathode-ray tube.
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Atomic model
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Electrons scattered through it like currants in a bun.
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determined the unit charge of the electron
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Gave more to the periodic table
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Wave equation was his greatest discovery.
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Discovers the neutron.
