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 Particle Zoo |

    9    

9 F Fluorine

Halogen, nonmetal, mass: 18.998 u, 1 stable isotope (19), abundance rank (earth/space): 18/22

Click image to magnify. Natural fluorite, stained by impurities, 15 grams. Original size in cm: 2.5 x 3.5
Fluorite Fluorite mineral
Fluorine is the most chemically aggressive element. In pure form it is a pale, yellow-green F2 gas. It is extremely toxic and reacts with nearly everything, in most cases very violently. At contact with water, it forms the very caustic hydrofluoric acid, HF. Its salts (fluorides), especially fluorite (calcium fluoride, CaF2), which is shown here, frequently occur in nature as minerals. Fluoride is needed for bones and teeth, but quickly becomes poisonous if the dose is too high.

Fluorine gas
Fluorine gas, but only as photomontage, because fluorine reacts even with glass. It could look like that (under a high pressure, otherwise fluorine is nearly colorless), before it would corrode the glass and the gas would be used up.


Creative Commons License The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking to the according element page.