US chemist. In 1932 he isolated
heavy water and was awarded the Nobel Prize for Chemistry in 1934 for his discovery of
deuterium (heavy hydrogen).
During World War II he was a member of the Manhattan Project, which produced the atomic bomb, and after the war he worked on tritium (another isotope of hydrogen, of mass 3) for use in the hydrogen bomb, but later he advocated nuclear disarmament and world government.
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