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A Greek philosopher Democritus that said matter is made up of small particles called atoms.
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He was a British scientist and a school teacher. He reminds everyone the idea of atoms with evidence to support his tohughts.
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He was a British scientist finds that electrons are particels that are in every atom.
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He was a physicist from New Zealand, and he discovered protons in the nucleus of the atom.
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He was a scientist that invented the Electron Cloud.
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The Modern Atomic Theory that states everything is made out of atoms.