Fluorine is represented by the symbol F in the periodic table. The symbol is derived from the Latin word "fluor," meaning "flow," which is fitting because fluorine is a highly reactive element. It is a pale yellow gas that is extremely corrosive and toxic. Fluorine is the most electronegative element, meaning it has a strong attraction for electrons. It readily forms compounds with other elements, especially metals, and is used in various industrial applications, including the production of fluoropolymers, refrigerants, and pharmaceuticals.