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All matter consisted of very small particles that couldn't be divided
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All matter is made up of individual atoms, which cant be divided.
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Thompson discovered that atoms are made of even smaller particles. He discovered the electron, and made the plum-pudding model.
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All atoms have a central nucleus. Electrons orbit around it.
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All of an atoms positive charge is located in its nucleus.
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Neils Bohr found that a electron can move from one energy level to another, when atoms gain or lose energy.
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porposed that electtrons have some properties of the waves
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Erwin Schrodinger developed equations to describe motions of electrons in atoms. This would lead to the electron cloud model.
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confirmed existence of neutrons, with no charge
