James chadwick
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While working under Ernest Rutherford in 1932 at Cambridge, James proved the existence of neutrons, the elementary particle without any electrical charge and a fundamental building block of the atom’s nucleus. This was one the most important scientific discoveries in the 20th century. It earned James the 1935 Nobel Prize for Physics. After this very big breakthrough, him and other scientists began experimenting on all types of materials with neutrons. This all lead to the discovery of nuclear fission when uranium was bombarded with neutrons. This eventually lead to the development of nuclear weapons and nuclear power production. During World War I, James studied under Hans Geiger, and was working in Germany. He was imprisoned for the duration of that war. During World War II, he returned to the United States, were he contributed to the Manhattan Project that created the world’s first atomic weapons.