jan 20, 1789 - Antoine Lavoisier: He discovered four elements which were hydrogen, oxygen, carbon and silicon. Moreover, he formed the law of conservation of mass which states that in a chemical change, no atoms are created nor destroyed along with the establishment of chemical nomenclature which is a naming system for chemical compounds. Additionally, Lavoisier contributed to the periodic table by being the first person to classify elements into metals and non-metals.
Added to timeline:
Date:
jan 20, 1789
Now
~ 236 years ago