Discovery of Neutron: Rutherford, in 1920, predicted about neutron but it was discovered by James Chadwick in 1932. He performed an experiment. How the neutron was discovered? James Chadwick bombarded beryllium with α-particles and found that highly penetrating radiations were emitted from beryllium, which in turn have knocked out protons from paraffin target. ByDiscovery of Neutron- How the neutron was discovered?
