30 lugl 1803 anni - John Dalton
Descrizione:
Dalton theorized that all matter is made of atoms, that atoms are invisible, and that all elements in an atom are identical to mass and properties. He also said that compounds are combinations of two or more different atoms and that a chemical reaction is just the atoms rearranging.Aggiunto al nastro di tempo:
Data:
30 lugl 1803 anni
Adesso
~ 220 years ago
