8 Nuclear

Question 1

James Chadwick

Answer 1

Discovered neutrons. Polonium produced alpha particles that collided with neutrons in beryllium, the Bettina are ejected and then collide with protons in paraffin. Since the alpha particles and protons are charged and easy to detect, the uncharged particles must exist.

Question 2

Murray Gell-Mann

Answer 2

Built the system of fundamental particles