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Democritus develops the idea of atoms
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John Dalton came up with the first experiment that matter was made up of tiny particles
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Conducted his gold foil experiment where he fired helium nuclei and discovered about 1 in every 10,000 nuclei hit the gold foil
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Bohr refines Rutherford's experiment by adding that electrons were in orbit around the nuclei
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discovered that the nucleus had protons and neutrons
