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Atom's cannot be destroyed, differ in size, shape and temperature, are always moving and are invisible.
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All matter is made of atoms. Atoms are invisible and indestructible. Identical in mass and properties. Compounds are two or more different atoms. A chemical reaction is a rearrangement of atoms.
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Identified the negatively charged electron
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Determined the charge of the eletron using the oil drop experiment
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Proposed the nuclear atom as a result of the gold foil experiment
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Proposed the atomic nucleus
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Discovered the neutron
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