The first subatomic particle to be identified was the electron, in 1898. Ten years later, Ernest Rutherford discovered that atoms have a very dense nucleus, which contains protons. In 1932,
Who discovered sub atomic?
Thomson had discovered the first subatomic particle, the electron. Six years later Ernest Rutherford and Frederick Soddy, working at McGill University in Montreal, found that radioactivity occurs when atoms of one type transmute into those of another kind.
What subatomic particles were in 1920?
May 1932: Chadwick Reports the Discovery of the Neutron. 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.
