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METALS
non-METALS
Fluorine
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20Goudy Stouttrue51 102 0
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</a><a href="aluminium.cml"><img src="aluminium.jpg" width="260" height="50">
</a><a href="potassium.cml"><img src="potassium.jpg" width="260" height="50">
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20Goudy Stouttrue51 102 0
20Goudy Stouttrue
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</a><a href="fluorine.cml"><img src="fluorine.jpg" width="215" height="50">
</a><a href="phosphorus.cml"><img src="phosphorus.jpg" width="215" height="50">
</a><a href="sulphur.cml"><img src="sulphur.jpg" width="215" height="50">
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30Times New Romantrue
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<h1>
Fluorine is a chemical element with symbol F and atomic number 9. It is
the lightest halogen and exists as a highly toxic pale yellow diatomic
gas at standard conditions. As the most electronegative element, it is
extremely reactive: almost all other elements, including some noble
gases, form compounds with fluorine. Among the elements, fluorine ranks
24th in universal abundance and 13th in terrestrial abundance. Fluorite,
the primary mineral source of fluorine, was first described in 1529; as
it was added to metal ores to lower their melting points for smelting,
the Latin verb fluo meaning "flow" became associated with it. Proposed
as an element in 1810, fluorine proved difficult and dangerous to
separate from its compounds, and several early experimenters died or
sustained injuries from their attempts.
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