Fluorine is found in the minerals fluorapatite, cryolite and fluorspar in the Earth's crust. It is not found as a free element in nature because it is too reactive.
Fluorine is classified as a nonmetal and is a halogen. It is the most reactive and electronegative element, meaning that it attracts electrons toward itself. It appears pale yellow as a gas and is corrosive. Fluorine reacts with most organic and inorganic substances. It is unusual for fluorine to be used in its pure form, but compounds of fluorine are used in toothpaste, pharmaceuticals and tap water and to prevent tooth decay.Learn More
Fluorine is the most reactive of the halogens because it is at the top of the halogen group, which is the second to right group on the periodic table. With halogens, the higher an element is in the column, the more reactive it is.Full Answer >
Fluorine can be found as part of minerals like fluorite, fluorspar and cryolite. The element, with seven electrons in its outermost energy level, is highly reactive and thus cannot be found in its free form in nature.Full Answer >
An atom of fluorine has seven electrons in its outermost layer. Fluorine is the most electronegative and, therefore, the most reactive element on the periodic table. Fluorine readily grabs an electron from another atom to achieve a more stable configuration.Full Answer >
While sodium is one of the most abundant elements in the crust of the Earth, About.com indicates it never exists in its elemental form. It is highly reactive and forms many compounds, including sodium chloride, or table salt. The most common form of sodium chloride on the Earth is halite, a mineral that miners remove from large mines. The rock salt from these mines remains from the evaporation of oceans.Full Answer >