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https://www.youtube.com/watch?v=4RtnbMWrs6s
https://www.youtube.com/watch?v=dJjOxt4A-XI

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http://www.chemistryexplained.com/elements/C-K/Fluorine.html

http://www.rsc.org/periodic-table/element/9/fluorine

http://education.jlab.org/itselemental/ele009.html

http://fluorine.atomistry.com/isotopes.html

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The density of this element is 1.695 grams per liter. Fluorine is natural.

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This element is extremely reactive! If it's mixed with water it can react explosively! Fluorine's melting point is 53.53 K (-219.62°C or -363.32°F). It's boiling point is 85.03 K (-188.12°C or -306.62°F).

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Fluorine has one stable isotope, and that's 19F. The half-life I found for 19F was 109.8 minutes. There zero known natural isotopes of fluorine. On the other hand, there are 22 artificial isotopes that are all radioactive of fluorine. They range from 14F-31F.

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Fluorine is used to make uranium hexafluoride, needed by nuclear power industries. It is also used to make sulfur hexafluoride, the insulating gas for high-power electricity transformers.

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Fluorine was discovered by Henri Moissan in 1886. He was the first chemist ever to totally isolate fluorine by itself. He earned the Nobel Peace Prize for his work with fluorine and chemistry in 1906.

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- atomic mass is 18.998403

- atomic number is 9
- Fluorine is a member of the halogen family
- Fluorine is a nonmetal
- electron configuration: [He] 2s2 2p5
-Period: 2 Group: p-block 17