John Dalton said that all matter was made up of tiny spheres (atoms), and that each element was made up of a different type of atom.
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What did J.J. Thompson discover?
Electrons
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Who created the plum pudding model?
J.J. Thompson
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How did J.J. Thompson discover the electron?
Gold Foil Experiment: He shot Alpha Particles at a sheet of gold. Most passed straight through, some bounced off and some reflected back. + plus + = repel. Thompson knew this. Electrons are + and atoms are neutral, therefore there is a + part.
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