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Thales of Miletus was the first philosopher who thought everything was made of water
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Democritus was the first to think of the idea of the atom.
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Aristotle was the philosopher who thought everything was made of Earth, Fire, Air, and Water.
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Isaac Newton was the first to be public about his belief that Democritus was correct.
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John Dalton founded the Atomic Theory of Matter.
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He discovered radioactivity and did a uranium experiment.
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Discovered the electron with the cathode ray tube.
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Found the mass and charge of electron with oil drop experiment.
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Used to discover the nucleus.
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Discovered the proton and nucleus with golf foil experiment.
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He discovered the electrons follow a path around the nucleus, bohr model.
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Discovered Isotopes with the Mass Spectogram.
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Created Schrodinger's model (plum pudding model).
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Proved Neutron's existence.