Antoine lavoisier atomic theory timeline project

25 scientists that contributed to the atomic theory

Jan 1, Period: Jan 1, to Dec 31, Antoine Lavoisier found in these 22 years the Law of Conservation of Mass, which states that the mass is conserved in a chemical reaction; the masses of two elements are constant throughout any chemical reaction they may endure. Based off of and supported John Dalton's atomic theory, this law was proved by Joseph Proust through experments between and This law states that a chemical compound always contains exactly the same proportion of elements by mass.

This law is also known as Proust's Law, after Joseph Proust. His theory included many new ideas about atoms and elements: elements can be distinguished by their weights, matter is composed of atoms, atoms cannot be created not destroyed, atoms of the same element are identical, different elements have different kinds of atoms with different characteristics, if atoms are rearranged, then a chemical reaction has occured, and atoms of compatable elements may join to form compounds.

Jan 2, This theory helped Dalton and other scientists to rationalize new laws concernin chemical change and compound formation. However, this theory is not entirely correct, but it did lead to new kinds of experiments. Dalton's theory opened new ideas for scentists then and today to advance the scentific knowledge of atoms. John Dalton used his atomic theory to depict what an atom would look like.