James+Chadwick(DD)


 * __James Chadwick__**



date of birth: October 20th 1891 date of death: July 24th 1974 country of origin: Cheshire, England

· born in Cheshire, England, on 20th October, 1891, the son of John Joseph Chadwick and Anne Mary Knowles. · He went to Manchester high school before attending Manchester University in 1908 and graduated from the honors school of physics in 1911 · Spent the next two years in a laboratory with professor Ernest Rutherford · He was interned in WWI until 1919, then went to Gonville and Caius College to resume work under Rutherford · In 1932 he discovered the neutrons in and atom and said they were the same mass of a proton

· In 1932 James proved the existence of neutral particles in an atom · James said that the neutrons were just about the same weight as protons · He discovered this by using alpha rays, which are charged, and therefore repelled by considerable electrical forces present in the nuclei of heavier atoms · Chadwick led the way to the starting of penetrating and splitting the nuclei of atoms. · Also led the way to the fission of uranium 235, which eventually created the atomic bomb