James Chadwick was born on October 20, 1891 in Bollington, Cheshire. He went to Manchester University and moved to worked with Hans Geiger in Berlin. Due to his desire to push science farther, he became a physicist. He moved to Cambridge to work with Ernest Rutherford in 1918. He researched alpha particles. Strong gamma radiation and conservation of the energy lead Chadwick to believe there were new particles. He continued his research to find the neutron in 1932. He worked to determined atomic numbers of elements. In 1935 he was awarded with a Noble Prize for Physics. He was then Knighted in the 1945 died July 24th, 1974 in Cambridge, United Kingdom.