Antoine Laurent Lavoisier

Born in Paris in 1743, Antoine-Laurent Lavoisier became one of the central figures in the scientific transformation of chemistry in the eighteenth century. He is best known for showing that combustion and respiration involve oxygen, for helping replace the old phlogiston theory, and for insisting on exact weighing and measurement in chemical experiments.

Lavoisier also helped create a more orderly language for chemistry, making the subject easier to study and teach. His Elementary Treatise of Chemistry is widely remembered as one of the first modern chemistry textbooks, reflecting his effort to organize the field around observation, experiment, and clear definitions.

His life ended during the French Revolution, when he was executed in Paris in 1794. Even so, his influence lasted far beyond his lifetime, and he is still remembered as a founder of modern chemical science.