30 jul 1803 año - John Dalton
Descripción:
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.
Añadido al timeline:
Atomic History
fecha:
Fotos:
![]()
