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Francis William Aston

1877–1945

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Francis William Aston (1877–1945) was a British chemist and physicist who invented the mass spectrograph and discovered a large number of isotopes, earning the Nobel Prize in Chemistry in 1922. His work provided empirical evidence for the existence of isotopes and the whole-number rule, revolutionizing atomic theory and the understanding of atomic weights.

Chemistry

WORKS

Isotopes (1922)
Mass Spectra and Isotopes (1933)
The Mass Spectrograph and Its Applications (1920)
The Constitution of the Elements (1923)
The Whole-Number Rule (1925)

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