Fluorine

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Fluorine (F) is the most reactive of all elements. There is no chemical substance capable of freeing it from any of its compounds.^[1]

Fluorine element and various compounds have a number of uses, ranging from the construction of nuclear bombs to additives in dental products which are designed to promote oral health. Pure fluorine is not generally available, since it is extremely dangerous, but fluorine compounds known as fluorides can be found in dental products and municipal water supplies, among other places.^[2]

Properties of Fluorine

• Atomic number: 9
• Atomic weight: 18.9984032
• Melting point: -363.32°F (-219.62°C or 53.53 K)
• Boiling point: -306.62°F (-188.12°C or 85.03 K)
• Density: 0.001696 grams per cubic centimeter
• Phase at room temperature: Gas
• Element classification: Non-metal
• Period number: 2
• Group number: 17
• Group name: Halogen^[1]

References

1. http://education.jlab.org/itselemental/ele009.html
2. http://www.wisegeek.com/what-is-fluorine.htm