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Aristotle stated that all substances were made of the 4 elements,water earth fire and air.
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Democritus proposed the existance of atoms and said they were real
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John transfromed Democritus' ideas on atoms into a scientific theory.
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Thomson discovered the electron, and conducted the cathode ray tube experiment.
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Milikan determined the massand the charge of the electron, and conducted the oil drop experimant,
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