James Chadwick 1900 s By Lauren Cordero Ryan

James Chadwick 1900 s By: Lauren Cordero, Ryan Brown, Vicki Fiebig, and Marie Ciprari

Time Line • • • 1891 - Born in Manchester 1908 - Graduated Manchester University 1927 - Elected to be in the Royal Society 1932 - Discovered the Neutron 1935 - Receives Noble Prize for Physics 1974 - Dies in Edingburgh

Background • Born in Cheshire, England on October 20, 1891 • Attended Manchester High School • Attended Manchester University • Graduated from Honors School of Physics

Contributions to the Atomic Theory of Matter • Discovered a third type of subatomic particle which he named neutron. • Neutron- uncharged particle • The neutrons were not affected by the electric field. • Stated that they came from the nucleus and had no charge. • He concluded that electrons are going around the atom, otherwise known as electron orbits

Achievements • Awarded the Hughes Medal of Royal Society in 1932 • Awarded the Noble Prize in Physics in 1935 for the discovery of the Neutron • Elected to the Lyon Jones Chair of Physics in the University of Liverpool • Many papers published on the topic of radio activity • Received Copley Medal in 1950

Experiment • Chadwick made a fundamental discovery in the domain of nuclear science • He proved the existence of neutrons • In contrast with the alpha rays which are charged • Prepared the way towards the atomic bomb