While researching the greatest chemists who ever lived, I couldn't help but notice one missing from the list. Boyle, Mendeleev and Lavoisier were on everyone's list; and rightly so, but I believe people overlook the exceptional work of Henry Louis Le Chatelier. Le Chatelier studied chemistry extensively at school and made great discoveries as a science teacher at colleges in France. He is best known for the principle that bears his name: Le Chatelier's principle, which I will discuss in detail later in this article. My goal in this article is to highlight the importance of Le Chatelier's life and his work in the field of chemistry and science. To achieve this goal, I have organized my article into four sections. The first will detail Le Chatelier's childhood and personal life so that anyone can understand what shaped him into the man he became and his goals in life. The second section will present his career and his scientific work. The third section will describe Le Chatelier's principle used by chemists to predict the effect of a change in condition on a system in chemical equilibrium. Finally, the last section will inform you of his last years and the decorations he received. The last page of my article will be a works cited page and I will also include in-text citations to give you the works I used.Childhood and personal lifeLe Chatelier was born on October 8, 1850 in Paris to his parents Louis Le Chatelier and Louise Durand. His mother was responsible for raising the children and his father was a French engineer who was an important figure in the early French aluminum industry. He also introduced Martin-Siemens processes to the iron and steel industries and played an important role in the paper sector, as well as winning numerous awards at international exhibitions. He died at his country estate, Miribel-les-Echelles, in Isère, France, on September 17, 1936 (Lette).ConclusionLe Chatelier's discoveries were and still are essential to the understanding of the key principles of chemistry. He invented instruments and tools for measuring high temperatures, and his studies in the fields of explosive materials made work safer for miners. He is best remembered for his own principle regarding balance. Essentially, this principle says that a reaction in a state of equilibrium will compensate for changes in the system by counteracting the change to restore balance. It helps chemists predict how changes in concentration, pressure, volume or temperature will affect their reactions. Le Chatelier's work is impressive and he will always be remembered as one of the greatest chemists of all time...