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Crayons have been given chemical names representing the color of the chemical by Que Interesants

Here the pale-orange, apricot color of fluorine, F2

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Fluorine  F

 

Where is fluorine used--or where does it impact our everyday lives?

 

Used in prevention of tooth decay in tin IV fluoride (stannous fluoride)

 

Fluorine  symbol: F

Atomic number: 9   Atomic Mass:  19

Position on the periodic table: Halogen

Group 17  halogen    Period 2

Melting point     -219.67 °C, (−363.41oF)

Boiling point     -188.11 °C,   (−306.60 oF)

Reaction with air (oxygen): 2F2 + O2 --> 2OF2

Reaction with water: F2 + 2H2O --> O2 + HF

Electron configuration: 2,7

Source: LANL.gov

Researcher: Luke C

 

 

 

Present in the mineral fluorite

 

The element fluorine is found in fluorite , CaF2, the mineral form of calcium fluoride, on display at the National Museum of Natural History in Washington D.C. This halide mineral came from the Ozark Mahoning mine, Rosiclare, Illinois, USA and contains fluorine which exists pure as a pale yellow gas with the atomic number 9. Fluorine is a halogen and because it is so reactive it is not found as a free element in nature but in minerals, mainly fluorite. China and Mexico supply the majority of the world’s fluorite. The abundance of fluorine in the Earth’s crust is 0.054%.

Fluorite (calcium fluoride, CaF2) which is used to reduce the melting point of sodium chloride and other salts when melted for electrolysis, to produce elemental sodium.

Photographed by Ryha E

 

 

 

 

Frosted glass in opaque light bulbs is etched with hydrofluoric acid, HF.

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Etching glass involves compounds of fluorine.  Hydrofluoric acid, HF, is an etching material.  Commercially hexafluorosilicic acid, H2SiF6, formed from hydrofluoric acid, HF, quartz, SiO2, calcium fluoride, CaF2, and concentrated sulfuric acid, H2SO4,  is used.

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Fluoride treatment at the dentist involves rinsing the teeth with a 2% sodium fluoride, NaF, solution for 30 seconds.

Photographed in Dr. Farahi's dental office in McLean, Virginia, USA

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