James Chadwick

James studied in Manchester high school and later Manchester University. For the next two years after graduation, he worked under Ernest Rutherford, another famous physicist. Chadwick later became the assistant director of the Cavendish Laboratory James Chadwick discovered the neutron. He first theorized that there was the existence of a particle that has no charge in an atom, which he calls a neutron, when he noticed that that the atomic number (positive charge of an atom) of an element is less than its atomic mass. Electrons have virtually no mass, so he thought that there was another subatomic particle that makes up the nucleus and has no charge, or it would change its atomic number. James Chadwick’s discovery of the neutron then became the fundamentals of the development of the atomic bomb. James Chadwick was also involved with the development and research on the atomic bomb. He joined the Manhattan Project, which developed the “Fat Man” and “Little Boy” that were dropped on Hiroshima and Nagasaki.