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He thought everyhting was made out of water.
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The was the first one to think there was an atom.
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He did not believe in the atomic theory.
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He thought atoms were tiny particles.
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He came up with the atomic theory.
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He discovered radioactivity.
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He discovered the electron.
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Showed Rutherford that there was a nucleus.
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He determined the charge and mass of an electron.
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Created the Bohr model, showing that electrons were on fixed paths.
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Aston studied and discovered the isotope during a mass spectrometer.
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He used math problems to describe the probability of where an electron will be. (The Quantum Model)
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He discovered evidence toward the existance of neutrons.
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He discovered that atoms contain a nucleus.