|James Chadwick (1891 - 1974)|
James Chadwick is best known for his discovery of the neutron in 1932, for which he received the Nobel Prize in 1935. Born in Manchester, he was one of the most brilliant disciples of Ernest Rutherford, with whom he worked from 1909 to 1935. Chadwick was one of the first in Britain to stress the possibility of developing an atomic bomb. Between 1943 and 1945 he was head of the British delegation at Los Alamos working on the Manhattan Project.