For four years, James Chadwick ... the atom's nucleus. But they and other researchers were finding that the proton did not seem to be the only particle in the nucleus. As they studied atomic ...
Photo: Atomic bomb test explosion in Alamagordo, New Mexico, July 16, 1945. AP/Wide World Photos In 1932, James Chadwick ... model of the nucleus, they suggested that when split, both halves of ...
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