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Ancient Greeks thought atoms were indivisible. The word atom comes from the Greek word Atomos which means "can't be divided"
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He thought that Atoms were solid spheres
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Made Cathode Ray tube
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he discovred electrons and made the plum pudding model.
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He figured that electrons are in orbits, or energy levels around the nucleus electrons are in unpredictable motion.
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He made the atomic theory
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Discovered the nucleus of an Atom
