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democritus theory was that everything was made of atoms.
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dalton had the same idea as democritus
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J.J. thomson discovered the electron and making a model like the plum and putting model
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robert made his model very different than others and was very creative
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ernst discovered the nuclei and his theory was that there was electrons orbiting the nuclei
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James Chadwick proved the existence of neutrons.
This affected the atom model greatly
James Chadwick changed the way the atom was viewed. -
neils made a new atom model and there was a very big model that he brought out
