31 déc. 1931 - James Chadwick discovered that atoms consisted not only of protons and electrons but also neutrons. Chadwick discovered the neutron, a neutral subatomic particle that has approximately the same mass as a proton. Neutrons occupy the nucleus of the atom.
Ajouté au bande de temps:
Date:
31 déc. 1931
Maintenaint
~ Il y a 92 ans
