Antoine Lavoisier
French nobleman and chemist who revolutionized chemistry by introducing quantitative methods and discovering oxygen's role in combustion.
Antoine-Laurent de Lavoisier is widely regarded as the central figure of the 18th-century chemical revolution, fundamentally transforming chemistry from a qualitative discipline into a quantitative science. His most celebrated achievement was the discovery of the role of oxygen in combustion, which directly refuted the prevailing phlogiston theory. He named the element oxygen in 1778 and later identified hydrogen as a distinct element in 1783. Through meticulous experimentation and more precise measurements than his predecessors, Lavoisier confirmed the principle that mass remains constant in a closed system, even as matter changes form—a concept now known as the law of conservation of mass. This insight laid the groundwork for the balanced chemical equations still used today. Beyond his experimental work, Lavoisier contributed to the construction of the metric system and authored the first comprehensive list of elements, in which he predicted the existence of silicon. He also helped reform chemical nomenclature in 1787. His wife and laboratory assistant, Marie-Anne Paulze Lavoisier, was a notable chemist in her own right and collaborated with him on developing the metric system. Lavoisier funded his scientific research through his role as a powerful administrator of the Ferme générale, a highly unpopular tax-collection agency of the Ancien Régime. During the French Revolution, he was charged with tax fraud and selling adulterated tobacco, and despite appeals citing his scientific contributions, he was guillotined on 8 May 1794. A year and a half later, the French government exonerated him.
- born
- 26 August 1743
- died
- 8 May 1794
- field
- Chemistry
- nationality
- French
- known_for
- Discovery of oxygen's role in combustion; naming oxygen (1778) and hydrogen (1783) as elements; confirming the law of conservation of mass; helping construct the metric system; writing the first exten
Lore & Background
Lavoisier is noted for his discovery of the role oxygen plays in combustion, opposing the prior phlogiston theory. He named oxygen (1778), recognizing it as an element, and also recognized hydrogen as an element (1783). By using more precise measurements, he confirmed the law of conservation of mass, which led to the development of balanced chemical equations. He helped construct the metric system, wrote the first extensive list of elements, and helped to reform chemical nomenclature (1787). His wife and laboratory assistant, Marie-Anne Paulze Lavoisier, worked with him to develop the metric system of measurements. Lavoisier was a powerful member of aristocratic councils and an administrator of the Ferme générale. At the height of the French Revolution, he was charged with tax fraud and selling adulterated tobacco, and was guillotined. A year and a half later, he was exonerated by the French government.
Reader's Guide
Lavoisier's great accomplishments in chemistry stem largely from his changing the science from a qualitative to a quantitative one. He was born to a wealthy family in Paris on 26 August 1743. He studied at the Collège des Quatre-Nations, University of Paris, and later received a law degree but never practiced. His first chemical publication appeared in 1764. In 1768 he received a provisional appointment to the Academy of Sciences. He worked on a geological survey of Alsace-Lorraine in 1767. He bought a share in the Ferme générale at age 26 and married Marie-Anne Pierrette Paulze in 1771. She translated English documents for him, assisted in the laboratory, and created sketches of instruments. Lavoisier was guillotined on 8 May 1794.
Did You Know?
- Lavoisier named oxygen in 1778 and recognized hydrogen as an element in 1783.
- He helped construct the metric system and wrote the first extensive list of elements.
- His wife Marie-Anne Paulze Lavoisier translated English documents and assisted in his laboratory.
- Lavoisier was guillotined during the French Revolution but exonerated a year and a half later.
More in Notable Figures
Elsewhere in the Historical Figures universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record