Antoine Lavoisier
AKA the father of modern chemistry discovered the theory of conservation of mass, and balancing equations. It is a fundamental principle of both physics and chem. Using experiments based on combustion, he discovered the law, and then could predict the outcome of future experiments. Part of his combustion experiments showed that both diamonds and graphite were both forms of carbon by burning them and producing CO2. He also proved that humans and combustion both produce CO2, beginning to understand biochemistry and metabolism.
He was born in France in 1743, and then guillotined in 1794 during the French Revolution.
(http://www.chem.uic.edu/lavoisier.htm)
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(http://www.homeoint.org/morrell/articles/photo/lavoisier.jpg)

Andreas Sigismund Marggraf
Andreas Sigismund Marggraf was born on March 3, 1709 in Berlin, Germany. He was a mysterious man who does not have much about his life. Marggraf was known for his study of artificial materials and chemical composition of natural materials. He proved that alumina, magnesia, and lime are distinct earths. Also found an improved method for the commercial preparation of phosphorus, and isolated zinc. Most of these discoveries helped to develop and understand the atom. The discoveries made give a more in-depth explanation to the atom.
http://www.infoplease.com/ce6/people/A0831787.html
http://www.encyclopedia.com/doc/1G2-2830902819.html


Charles-Augustin de Coulomb
Charles-Augustin de Coulomb was born June 14, 1736, Angoulême, France. He attended the military engineering school École du Génie at Mézières, and graduated in 1761. Later he was posed as engineer-officer in the French colon Martinique. Augustin stayed there for nine years repairing and rebuilding forts that were destroyed during the Seven Years’ War. Finally in the year 1773 at the age of thirty-six he returned home.
Charles-Augustin de Coulomb was a very distinguished physics researcher, although he only spent his spare time on it. He developed an extremely sensitive instrument named the torsion balance. This was a device that measured the earth’s natural gravity field. Augustin then had a law named after him which states “electrostatics stating that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.” (http://www.thefreedictionary.com/Coulomb%27s+law)
http://www.biography.com/articles/Charles-Augustin-de-Coulomb-9259075
http://en.citizendium.org/wiki/Charles-Augustin_de_Coulomb