Fluorine is a nonmetal that belongs to the family of elements called halogens. The symbol of fluorine is F, and its atomic weight is 18.9984032 atomic mass units or grams per mole.
Fluorine was discovered in 1886. The atomic number of fluorine is nine, and it has seven valence electrons in its outermost shell. It has 10 neutrons in the nucleus. The electronic configuration of fluorine is [He] 2s^2 2p^5. Fluorine is placed in the second period and group 17 of the periodic table of elements. It has a melting point of -363.32 degrees Fahrenheit and a boiling point of -306.62 degrees Fahrenheit. The density of fluorine is 0.001696 grams per cubic centimeter.