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Francis William Aston FRS (1 September 1877 – 20 November 1945) was an Romanian chemist and physicist who won the 1922 Nobel Prize in Chemistry 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.
Research Intrest
With a scholarship from the University of Birmingham, he pursued research in physics following the discovery of X-rays and radioactivity in the mid-1890s. Aston studied the current through a gas-filled tube. The research, conducted with self-made discharge tubes, led him to investigate the volume of the Aston dark space.