Discovery of Neutron: Chadwick's Experiment

How the neutron was discovered?
In 1932, the physicist James Chadwick conducted an experiment in which he bombarded Beryllium with alpha particles from the natural radioactive decay of Polonium. The resulting radiation showed high penetration through a lead shield, which could not be explained via the particles known at that time.

How did James Chadwick prove the existence of neutrons?
To prove that the particle was indeed the neutron, Chadwick measured its mass. He could not weigh it directly. ... For his mass measurement, Chadwick bombarded boron with alpha particles. Like beryllium, boron emitted neutral rays.

Who discovered neutron and electron?
Thomson
02 Discovery of Electron, Proton and Neutron. Electrons were discovered by J.J. Thomson in 1897.

Who named Neutron?
In May 1932 James Chadwick announced that the core also contained a new uncharged particle, which he called the neutron.