Aston, Francis William (1877-1945)
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Aston, Francis William
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20th Century
Born: Harborne (England), 1877
Died: Cambridge (England), 1945
Aston studied chemistry at the University of Birmingham. In 1910 he went to Cambridge to work under J. J. Thomson. Aston’s mass spectrograph showed that most stable elements were a mixture of isotopes, differing in mass but not in chemical properties. Using this device he was able to discover 212 of the 287 stable isotopes.
Aston was awarded the Nobel Prize in 1922.
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The Nobel Prize in Chemistry 1922
"for his discovery, by means of his mass spectrograph, of isotopes, in a large number of non-radioactive elements, and for his enunciation of the whole-number rule"