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Believed everything was made of water.
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Thought up the atom, believed it was a sphere.
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Believed all substances were made of fire, water, earth, and air.
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Believed matter is made of solid, imepenetrable particles.
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First person to have experimental evidence of the atom.
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Discovered radioactivity.
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Discovered the electron.
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Discovered the nucleus.
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Found the charge of an electron.
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Created Bohr model. Thought electrons orbited the nucleus.
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Created Quantum mechanical model. Predicted Electron location. Proved the Bohr model wrong.
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Proved the existance of Neutrons.