James Chadwick(1891-1974)
A nuclear physicist born on October 20,1891 in Bolington , U.K. He did research under Rutherford for a long time with alpha particles. In 1932 he discovered neutron and thus began a new era in atomic physics. He also discovered the mass of neutron. During the second world war he helped in the development of an atomic bomb. He made cyclotron for the first time in Britain in 1935. He also developed a research school in nuclear physics there. He was knighted in 1945. He died on July 24, 1974.
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