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Last updated 7:10 AM on 2/7/25

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Democritus

Named the atom.

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John Dalton

Formulated the law of multiple proportions.

3

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J.J. Thompson

Proposed the plum pudding model and discovered electrons.

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Ernest Rutherford

Conducted the Gold Foil experiment and discovered the nucleus.

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Niels Bohr

Developed the Bohr model of the atom.

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James Chadwick

Discovered neutrons.