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A biography of harold clayton urey a nobel prize winning scientist

After graduation from high school at 18, followed by some three months of education training at Earlham College, Harold taught in small country schools in Indiana and then Montana, where the family had moved.

In 1919 he returned to Montana to teach in the department of chemistry for 2 years. Urey's interest focused upon molecular structure, a new field for scientists in the United States.

Further Reading on Harold Clayton Urey

His doctoral research on the conductivity of cesium vapor led him to the theory of thermal ionization in stellar atmospheres. Within two years he received the doctorate 1923 and, with a Scandinavian Foundation fellowship, later studied in Copenhagen at the Institute of Theoretical Physics, headed by Niels Bohr.

During his residence at Berkeley and Copenhagen, Urey began to work with some of the most prominent physicists and chemists of the 20th century, including Werner Heisenberg, Wolfgang Pauli and Georg von Hevsey. In 1924 he returned to the United States to take a National Research Council fellowship at Harvard but instead accepted a faculty position as associate in chemistry at Johns Hopkins University, where he remained until 1929.

There he and Russel Bichowsky hypothesized the idea of electron spin to explain the fine structure of the atomic spectral lines.

Harold Clayton Urey Images

Between 1923 and 1929, Urey published 20 scientific papers or notes, almost all of them on aspects of atomic structure and the others on molecular band spectroscopy. In 1930 the book Atoms, Molecules, and Quanta, by A. Ruark and Urey, appeared. It became, and remained for a long time, one of the standard texts on the subject. Urey also published The Planets: Their Origins and Development in 1952. Her intelligence, good humor and warm hospitality made the Urey house a meeting place for scientists and intellectuals of all fields.

The Ureys had four children: In 1929 Urey became associate professor of chemistry at Columbia University in New York and professor in 1934. He refined his interest in sub-atomic and molecular structure and discovered a discrepancy in the atomic weight of hydrogen compared with that of oxygen, as measured by chemical means and by mass spectrometry. The discrepancy led to his identification of a heavy isotope of hydrogen deuterium found in concentrations of about 1 part per 5, 000. Calculating that the heavy isotope would boil less easily than the lighter, he had a friend at the Bureau of Standards, Ferinand G.

In the residue they and George M. Murphy discovered heavy water, molecules with one atom of oxygen and two atoms of hydrogen or deuterium.

  • Murphy discovered heavy water, molecules with one atom of oxygen and two atoms of hydrogen or deuterium;
  • Many of his later papers concerned the possible character of its formation and past history.

This led to Urey's award of the Nobel Prize for Chemistry in 1934. Journal of Chemical Physics, published by the American Institute of Physics for the new breed of physical chemists interested in subatomic and molecular spectroscopy and structure. He remained editor until 1941, established the journal's preeminent reputation and the name of the field, chemical physics. Urey's scientific work at Columbia became more and more concerned with the separation of isotopes of the lighter elements.

  • Copyright 2010 The Gale Group, Inc;
  • Their Origins and Development in 1952;
  • Her intelligence, good humor and warm hospitality made the Urey house a meeting place for scientists and intellectuals of all fields.

The rarer isotopes of oxygen, nitrogen, carbon, and sulfur were concentrated. When full-scale work began at Columbia on the separation of the rare fissionable lighter isotope of uranium, U235, from the much more abundant U238, Urey became project head. He then served as one of three program chiefs of the Manhattan Project.

Harold Clayton Urey Facts

Even after the project's successful conclusion at Oak Ridge, Tennessee, he felt discouraged. The atmosphere of secrecy, the tight time schedule, and the limitations and conflicts of the work oppressed him. After the war Urey, along with many others, was attracted to the plan of Chancellor Hutchins to build a group of research institutes at the University of Chicago.

For a while Urey, uncharacteristically, still suffering from the trauma of the war work, tended to drift, and he looked for new fields to conquer. He soon became interested in the past history of the earth and the planetary system. He initiated the use of analysis of the isotopic abundance in sea fossils to estimate the temperature of past oceans and helped prepare the most commonly accepted table of the elements. He also worked on meteoritic ages, composition, and classification. But his abiding interest then became earth's moon: Many of his later papers concerned the possible character of its formation and past history.

He influenced astronomers and others to consider chemical evidence in the origin of the solar system and later became an active consultant to NASA, Lunar Sciences, and to the Space Science Board, National Academy of Sciences.

  1. He then served as one of three program chiefs of the Manhattan Project. Urey also published The Planets.
  2. Boorse and Lloyd Motz, eds.
  3. He also worked on meteoritic ages, composition, and classification.
  4. Urey's scientific work at Columbia became more and more concerned with the separation of isotopes of the lighter elements.

The trials of Ethel and Julius Rosenberg, who were accused of stealing secrets relating to the construction of the atomic bomb, attracted Urey's interest in 1952.

The letters in their defense that he wrote to President Harry S. Truman, the New York Times and the presiding trial judge received mixed reviews from the public, but they further cemented his relationship with Albert Einstein, who wrote Urey a strong letter of support.

In 1958 Urey moved to the Scrimps Institution of Oceanography in La Jolla, where he continued to teach and to do active research in the general field of geochemistry and planetary science. He received numerous honors besides the Nobel Prize, including 23 honorary doctorates and membership or fellow of some 25 societies or academies.

His bibliography of scientific publications exceeds 200 titles. Urey later became a member of the Union of Concerned Scientists. In 1975 the organization petitioned then President Gerald Ford to limit the expansion of nuclear power plants.

Urey's expressed alarm for the safety of nuclear power plants, nuclear waste disposal and the spread of nuclear weapons. The collection contains his autobiography and all the available biographical sketches written during his career at University of California San Diego.

Shorter studies of his life and career are in Sarah R. Including Presentation Speeches and Laureates' Biographies, vol. Boorse and Lloyd Motz, eds.

  1. In 1929 Urey became associate professor of chemistry at Columbia University in New York and professor in 1934. Within two years he received the doctorate 1923 and, with a Scandinavian Foundation fellowship, later studied in Copenhagen at the Institute of Theoretical Physics, headed by Niels Bohr.
  2. In 1958 Urey moved to the Scrimps Institution of Oceanography in La Jolla, where he continued to teach and to do active research in the general field of geochemistry and planetary science.
  3. There he and Russel Bichowsky hypothesized the idea of electron spin to explain the fine structure of the atomic spectral lines.
  4. Truman, the New York Times and the presiding trial judge received mixed reviews from the public, but they further cemented his relationship with Albert Einstein, who wrote Urey a strong letter of support. Many of his later papers concerned the possible character of its formation and past history.

Holmes, editor, Dictionary of Scientific Biography 18 vols. Encyclopedia of World Biography. Copyright 2010 The Gale Group, Inc.