For four years, James Chadwick was a prisoner of war in Germany ... could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron.

For four years, James Chadwick was a prisoner of war in Germany ... could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron.

James Chadwick's school in Cheshire now has a blue ... Chadwick proved the existence of the neutron in the early 1930s after some speculative - or "quite silly" as he called it - experiments ...

Prof Val Gibson tells Melvyn Bragg about the device used in the discovery of the neutron. When later interviewed for the New York Times, Chadwick said ... a passage in James Joyce’s Finnegans ...