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Everything is made out of something
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Things are made of atoms
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Didn't believe in the atomic theory
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all atoms move around and are really small
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came up with the atomic thoery
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discovered radioactivity
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discovered electron
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determined charge and mass of electron
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discovered that electrons move on a fixed path around the nucleus (false)
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discovered isotopes
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was able to calculate where an electron would probably be with electron clouds
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discovered evidence toward existance of neutrons