apr 13, 1814 - 1814 John Dalton
Description:
John Dalton made a hypothesis from his previous works that contributed to the atomic theory. this hypothesis was composed of Elements are made of atoms. Elements are categorized by mass. Atoms cant be created or destroyed. Elements combine in simple whole number chemical compounds. Chemical reactions combine , separate, and rearranged atoms.Added to timeline:
Date:
apr 13, 1814
Now
~ 211 years ago