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Jhon Dalton created the first atomic therory.
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JJ Thomson was the first scientist to show that atoms were made of smaller things
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Marie Curie discoveredredioactive metals.
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Democritus discovered that matter could not be divided into smaller peices.
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Ernest Rutherford named "protons"
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Niels Bohr improved on Rutherfords model.
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Henry Moseley Provided the first experimental evidence on Neil Bohrs therory.
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Erwin Schrodinger new atoms model has improved since 1920
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James chadwick discovered nuetrons
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Lise Meitner Discovered Nuclear fission