On this day, 231 years ago, May 8, 1794 (April 10, 1794 in the lunar calendar), French chemist Lavoisier passed away. Antoine Laurent Lavoisier (1743-1794) was born in Paris. Later generations called Lavoisier the father of modern chemistry. His masterpiece for future generations is "Summary of Chemistry", a paper marking the birth of modern chemistry. Lavoisier listed the first list of elements, which are divided into four categories: 1. Simple substances, light, heat, oxygen, nitrogen, hydrogen and other material elements. 2. Simple non-metallic substances such as sulfur, phosphorus, carbon, hydrochloride, fluorinate, borate, etc., the oxide of which is acid. 3. Simple metallic substances, such as antimony, silver, bismuth, cobalt, copper, tin, iron, manganese, mercury, molybdenum, nickel, gold, platinum, lead, tungsten, zinc, etc., are oxidized to form a salt base that can neutralize acids. 4. Simple substances, lime, magnesia, barium, bauxite, silica, etc. When the French Revolution broke out in 1789, Lavoisier surrendered himself to prison because he had served as a tax collector. He was falsely accused of having dealings with enemies of France, was guilty of treason, and was hanged on May 8, 1794. Lagrange, the famous French Italian mathematician, said sadly: "They could cut off his head in an instant, but a brain like his might not grow one in a hundred years."