Antoine Lavoisier

Antoine-Laurent de Lavoisier (August 26, 1743 – May 8, 1794) was a French chemist, biologist, and economist whose contributions fundamentally revolutionized chemistry and established it as a modern quantitative science. Lavoisier is credited with the discovery of oxygen's role in combustion and respiration, which overturned the prevailing phlogiston theory that had dominated 18th-century chemistry. His formulation of the law of conservation of mass—that matter cannot be created or destroyed, only transformed—became a cornerstone principle of chemistry. Through meticulous experimentation and precise measurement, Lavoisier established chemistry as a quantitative discipline and created the modern system of chemical nomenclature. His groundbreaking work is documented in 'Traité Élémentaire de Chimie' (Elementary Treatise on Chemistry), which introduced the modern periodic table organization and established the theoretical framework for chemistry. Beyond chemistry, Lavoisier contributed to biology and was appointed to various governmental positions, including work on gunpowder production and agricultural reform. His life ended tragically when he was guillotined during the French Revolution's Reign of Terror, despite his contributions to society. His scientific legacy endures as foundational to modern chemistry, and he is remembered as one of history's most influential scientists.