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Fluorine

Fluorine is the chemical element in the periodic table that has the symbol F and atomic number 9.

Atomic fluorine is univalent and is the most chemically reactive and electronegative of all the elements.

In its pure form, it is a poisonous, pale, yellow-green gas, with chemical formula F2.

Like other halogens, molecular fluorine is highly dangerous; it causes severe chemical burns on contact with skin.

Note:   The above text is excerpted from the Wikipedia article "Fluorine", which has been released under the GNU Free Documentation License.
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May 28, 2015

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