James Chadwick (1891-1974) was an English physicist who proved the existence of the neutron in 1932, for which he received the 1935 Nobel Prize in Physics. Chadwick was born in Cheshire, England and studied physics at Manchester High School and Victoria University of Manchester, earning his BS in 1911 and MS in 1913. He worked with Ernest Rutherford at the Physical Laboratory in Manchester on radioactivity problems. Chadwick's discovery of the neutron later enabled the creation of the atomic bomb.