James Chadwick

By: Jose Tapay & Gurleen DhaliwalJames Chadwick

Biography Born in England in 1891Died July 24 1974Attended Manchester University in 1908Graduated from the Honours School of Physics in 1911Chadwick's research focused on radioactivityEnrolled in Ernest Rutherfords classes on electricity and magnetism

Idea of the Atom In 1932- discovered a third type of subatomic particle, which Chadwick named the neutron

Neutrons Stabilize the protons in the atom's nucleus. Help to reduce the repulsion between protons Do not have any electrical charge

ExperimentsExistence of the Neutron:Smashed an alpha particle into beryllium releasing radiation into paraffin wax. Beryllium radiation hit the hydrogen atomsDiscovered neutral particles (neutrons)

Major Scientific Contribution The neutron enabled scientists to produce new elementsIt also led to the discovery of nuclear fissionHelped to make the atomic bomb during WW11 Nobel Prize in 1935.

Bibliographyhttp://www.nobelprize.org/nobel_prizes/physics/laureates/1935/chadwick-bio.htmlhttp://www.ehow.com/info_8047231_experiments-did-james-chadwick-do.htmlhttp://hyperphysics.phyastr.gsu.edu/hbase/particles/neutrondis.htmlhttp://www.ehow.com/info_8099568_interesting-james-chadwick.html