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Theorized that matter was made of small, indivisible particles which he named atomos
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The Law of Conservation of Mass
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The Law of Definite Proportions
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Created the Law of Multiple proportions, which led to the Atomic Theory
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Periodic law, and first draft of periodic table
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Cathode ray experiments which led to discovery of electron
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Gold foil Experiment, which led to the Nuclear Theory
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Discovered Neutrons
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Bohr model
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Atomic number