Chemical reactions are the heart of chemistry. People have always known that they exist. The Ancient Greeks were the firsts to speculate on the composition of matter. They thought that it was possible that individual particles made up matter. Later, in the Seventeenth Century, a German chemist named Georg Ernst Stahl was the first to postulate on chemical reaction, specifically, combustion. He said that a substance called phlogiston escaped into the air from all substances …showed first 75 words of 1992 total…

…showed last 75 words of 1992 total…expansion of chemistry and our knowledge. Since Scientists are still experimenting, chemical reactions will always be a part of chemistry. Bibliography "Chemical Reactions," Encyclopedia Brittanica MACROPEDIA, 1995, Vol. 15 "Dances With molecules," Science News, Vol. 147, May 27, 1995 Eastman, Richard H., General Chemistry: Experimental and Theory, Holt, Rhinehart, and Winston Inc., 1970 "One Molecule at a Time", Discover, January 1996 Pauling, Linus and Peter, Chemistry, W. H. Freeman and Co., 1975 "Reactions, Chemical," Encyclopedia Americana, 1982, Vol. 23 "Reactions, Chemical," Academic American Encyclopedia, 1991, Vol. 16