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Believed everything was made of water
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He thought up the atom and thought that all matter was made up of atoms
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He didn't believe in atomic theory everything is made up of fire, water, earth, and air
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He thought that matter is formed of solid, massey impenetrable particles
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The atomic theory and was the 1st person to have experimental evidence
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discovered radioactivity
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discovered the electron
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Aimed a beam of alpha particles at a gold foil a few particles hit something in the middle and bounced back instead of going straight through which proves there is a nucleus
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found the charge of an electron
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thought electrons orbited around the nucleus contributed the Bohr Model
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Proved Bohr model wrong, Predicted the odds of electron location, and quatum mechanical model
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proves the exsistance of the neutron