9 gen 1939 anni - 1932 AD: James Chadwick, working with nuclear physics used alpha particles and discovered the neutron, the same mass as a proton and is found in the nucleus. They also had no charge and this model was a major improvement from Bohr’s model.
Aggiunto al nastro di tempo:
Data:
9 gen 1939 anni
Adesso
~ 85 years ago
