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He stated that elements had particles that combined in simply ways. He discovered atoms.
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Led to the understanding of the atoms molecular weight
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He developed system for visualizing the structure of organic molecules.
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He found three elements that were unknown at that time.
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He stated that atoms were not simply solid spheres. He discovered electrons.
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He stated that electrons existed in shells around the necleus.
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He stated that most atoms are made of space.
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He stated that electrons orbited the nucleus.
