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Was among the first theologists to suggest the existence of atoms
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Created the atomic theory
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Found evidenced that proved that positively charged atoms, protons, did exist.
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discovered the electron
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Performed experiments to find the measurement of the elementary electric charge
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Discovered the atom is empty except for is nucleus which is made up of protons and neurons, and tested the plum- putting model, and composed the gold foil experiment.
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Proved the existence of the non- charged particle the neutron
