25 dic 1803 anni - Dalton's atomic theory: Created by John Dalton; Proposed the theory that all matter was composed of atoms, indivisible and indestructible building blocks; While all atoms of an element were identical, different elements had atoms of differing size and mass.
Aggiunto al nastro di tempo:
Data:
25 dic 1803 anni
Adesso
~ 221 years ago