Question

Discovery of Neutons​

Answer 1

Answer:

Discovery of neutrons by James chadwick in 1932

Answer 2

By 1920, physicists knew that most of the mass of the atom was located in a nucleus at its center, and that this central core contained protons. In May 1932 James Chadwick announced that the core also contained a new uncharged particle, which he called the neutron.