23 oct. 1803 - John Dalton
Description:
John Dalton takes what Democritus said about the atom and says that:Elements are made of extremely small particles called atoms.
Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.
Atoms cannot be subdivided, created, or destroyed.
Atoms of different elements combine in simple whole-number ratios to form chemical compounds.
In chemical reactions, atoms are combined, separated, or rearranged.
Ajouté au bande de temps:
Date:
23 oct. 1803
Maintenaint
~ Il y a 222 ans