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Greek philosopher, and Believed that the universe was made of tiny "Uncuttable" Paricles
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Hypothesized that the atom was a tiny hard sphere, and Belived that the atoms of a given element are identical.
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Discovered the electron, Used the cathode ray tube in his discovery, Created the "plum pudding" Model of the atom
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Did the gold foil experiment, Discovered that the proton had a positive charge, and discovered that the stom is mostly empty space
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Created a model of the atom with elecrtons moving around the nucleus in fixed orbits, and
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Worked with the Quantum Theory, and Uncertainty principle a Particle's postion, energy, and time can never be Known
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Discovered the neutron, and Found the missing mass of the atom's nucleus
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