How common is fluoride?
How common is fluoride?
Fluorine is estimated to be the 13th-most abundant element in the earth’s crust and is widely dispersed in nature, entirely in the form of fluorides.
What are the disorders of fluoride?
Fluoride deficiency can lead to tooth decay and possibly osteoporosis. Consuming enough fluoride can make tooth decay less likely and may strengthen bones. The addition of fluoride (fluoridation) to drinking water that is low in fluoride or the use of fluoride supplements significantly reduces the risk of tooth decay.
Can fluorine be a solid?
Fluorine has two solid forms, α- and β-fluorine. The latter crystallizes at −220 °C (−364 °F) and is transparent and soft, with the same disordered cubic structure of freshly crystallized solid oxygen, unlike the orthorhombic systems of other solid halogens.
When was fluorine discovered and by whom?
Henri Moissan
Fluorine/Discoverers
Is magnesium a fluoride?
Magnesium fluoride is an inorganic compound with the formula MgF2. The compound is a white crystalline salt and is transparent over a wide range of wavelengths, with commercial uses in optics that are also used in space telescopes. It occurs naturally as the rare mineral sellaite.
What causes fluoride deficiency?
Fluorine deficiency | |
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Fluoride is sold in tablets for cavity prevention. | |
Causes | Lack of fluoride in the diet, poor oral hygiene |
Risk factors | Dental caries |
What color is fluorine solid?
Fluorine | |
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Allotropes | alpha, beta |
Appearance | gas: very pale yellow liquid: bright yellow solid: alpha is opaque, beta is transparent |
Standard atomic weight Ar, std(F) | 18.998403163(6) |
Fluorine in the periodic table |
Who discovered helium?
William Ramsay
Pierre JanssenNorman LockyerPer Teodor Cleve
Helium/Discoverers
What Colour is fluoride?
pale yellow
Fluorine | |
---|---|
Allotropes | alpha, beta |
Appearance | gas: very pale yellow liquid: bright yellow solid: alpha is opaque, beta is transparent |
Standard atomic weight Ar, std(F) | 18.998403163(6) |
Fluorine in the periodic table |