Antoine lavoisier
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He came important around the time of 1777. He never practiced law until the age of 21 when he began to fulfill his own dream and studied math and science. He believed that weight was conserved through the course of chemical reactions. He worked with burning materials and gases. He said that matter can neither be created nor destroyed in chemical reactions. He explained combustion and respiration with chemical reactions that involved component of air which was oxygen. He was able to build a laboratory at the Paris Arsenal where he was able to make important scientific connections. He was known as the father of modern chemistry which was the concept of the chemical element. He created the metric system which is still around and used today.