1 jan 1794 ano - Joseph Louis Proust

Descrição:

Joseph Louis Proust was a French chemist who created the Law of Definite Proportions. This law states that a chemical compound will always have its base elements in a fixed ratio no matter the source or method of preparation. This law by Proust is now the principal of anylitical chemistry.

Adicionado na linha do tempo:

Data:

Imagens: