A particle discovered by the Curie-Joliot experiment and first mistaken-ed as gamma rays. It wasn’t effected by magnetic or electric fields and named neutrons because it didn’t posses a charge. It’s found in the nucleus.
Studied at McGill University in Montreal
Discovered radioactivity involved emission of 2 kinds of particles, alpha and beta.
Discovered that an atom contained a small highly dense positively charged center, known as the nucleus.