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Believed all substances were made of earth, air, fire, and water
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First person to make an atom theory and come up with the word "atom"
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First person to investigate the atom
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All atoms were held together by attractions or forces
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First one to have proof of an atom through an experiment
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Believed all atoms were found through radioactivity
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First one to discover electrons
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found charge of individual electrons
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Alpha particles fired through a thin gold sheet into a zinc sulfite sheet
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found the nucleus and proton
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Believed electrons had a certain orbit
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came up with isotopes
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had the probablity that an electron would be in a certain position.
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He discovered the neutron
