sep 1, 1932 - In 1932, James Chadwick discovered the sub atomic particle known as the neutron.
Description:
Chadwick created a new sub atomic particles by bombarding another element with alpha particles. Chadwick interperted this radiation as being composed of particles with a neutral electrical charge and the same mass of a proton. This sub atomic particle was named; "Neutron."Added to timeline:
Date:
sep 1, 1932
Now
~ 93 years ago