1 nov 1803 - Dalton 1803 - He proposed the law of multiple proportions which led directly to the atomic theory. He also created the mole system and a system of symbols to represent different elements. He determined that 5% of the male population and 10% of females were colorblind.
Ajouté au bande de temps:
Date:
1 nov 1803
Maintenaint
~ Il y a 222 ans