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Latest revision as of 23:02, 24 May 2026

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James Chadwick
Chadwick
Chadwick
Born 20 October 1891
Bollington, England
Died 24 July 1974
Cambridge, England


Known for Discovery of the neutron
Awards Nobel Prize in Physics (1935)

James Chadwick (1891-1974) was a British physicist who discovered the neutron in 1932. The neutron completed the basic proton-neutron picture of atomic nuclei.

Neutron discovery

Chadwick interpreted penetrating neutral radiation from beryllium as a new neutral particle with mass close to that of the proton. The discovery made nuclear structure clearer and transformed nuclear physics.

The neutron later became central to nuclear reactions, isotope physics, fission, and the quantum description of nuclei.

References


Author: Harold Foppele