Nobel e-Museum: James Chadwick
Biography of the 1935 winner of the Nobel Prize in Physics. Also offers text of the presentation speech.
www.nobel.se/physics/laureates/1935/chadwick-bio.html
Wikipedia: James Chadwick
Information on the English physicist who discovered the particle in the nucleus of an atom that became known as the neutron because it has no electric charge.
en.wikipedia.org/wiki/James_Chadwick