Name Fluorine
Symbol F
Atomic Number 9
Atomic Mass 18.998 atomic mass units
Number of Protons 9
Number of Neutrons 10
Number of Electrons 9
Melting Point -219.62 C
Boiling Point -188.14 C
Density 1.696 grams per cubic centimeter
Normal Phase Gas
Family Halogen
Period Number 2
Cost $190 per 100 grams



Origin of Name From the Latin word fluo, meaning flow
Date and Place of Discovery 1886 in France
Discovered by Joseph Henri Moissan
Common Compounds Sodium fluoride (NaF)
Interesting facts
  • It is a yellow gas at room temperature.
  • It's the 13th most abundant element found in the earth's crust.
  • It isn't a free element in nature.
  • It is very reactive with other elements and can combine with almost any element.
  • The last United States mine to produce fluorine closed in 1995 making it necessary to import fluorine minerals.
Common Uses
  • Water treatment to prevent tooth decay
  • Toothpaste and other dental products
  • Refrigerants
  • Air-conditioning
  • Teflon


Photo Courtesy of LennTech Water Purification
Cary Academy
Chemical Elements

Fluorine Atomic Structure Elements by Name Elements by Number