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He discovered the existence of invisible atoms, characterized only by quantitive properties, size, and shape and motion.
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Proposed the Atomic Theory stated atoms of a given element posesses unique characteristics.
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Discovered electrons using a cahtode ray tube,changed model to the plum pudding model.
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DEveloped planetary model where the nucleus is in the center.
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Disocvered a small positively charged nucleus that is located in the center.
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Develpoed mathematical equations to describe the motion of electrons.
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Proved existence of neutrons.