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https://edubilla.com/award/national-medal-of-science/harold-clayton-urey/ Harold Clayton Urey | edubilla.com Harold Clayton Urey was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 for the discovery of... harold clayton urey https://www.daviddarling.info/encyclopedia/U/Urey.html Urey, Harold Clayton (1893-1981) Harold Urey was an American physical chemist who was awarded the 1935 Nobel Prize in Chemistry for his discovery of deuterium. harold claytonurey