1 lugl 1932 anni - Chadwick
Descrizione:
He noticed that the atomic # (= the # of protons) was less than the mass,which meant something else in the atom added mass, but no charge. He proposed that this extra mass were Rutherford's neutrons.Aggiunto al nastro di tempo:
Data:
1 lugl 1932 anni
Adesso
~ 93 years ago