By general consensus, the founder of modern chemistry is Antoine Lavoisier, who wrote the book Elements of Chemistry in 1787. In it, he established the conservation of mass after chemical interactions, and compiled the known elements at that time. Before Lavoisier, much of chemistry was closer to alchemy.
Other candidates for the title are John Dalton, Robert Boyle, Jābir ibn Hayyān and Jöns Jacob Berzelius. Boyle was the first to differentiate between alchemy and chemistry, Dalton established the first version of the atomic theory and Berzelius compiled an accurate table of atomic weights of the known atoms. The Persian Jābir ibn Hayyān applied scientific principles to alchemy.