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- Fluorine (8588 bytes)
34: '''Fluorine''' (from L. ''fluere'', meaning "to flow"), is the [[che...
45: ... such as [[Teflon]], and in [[halon]]s such as [[Freon]]. Other uses:
49: ...luorine is used in the production of [[uranium]] (from the hexafluoride) and in more than 100 differen...
50: ...ed extensively in [[air conditioning]] and in [[refrigeration]]. [[Chlorofluorocarbon]]s have been ban...
62: ...s due to its extreme reactivity - it is separated from its compounds only with difficulty and then it ... - Jurassic (4659 bytes)
1: ...r unit of the [[geologic timescale]] that extends from about 200 million years [[Before Present|BP]] a...
3: ...ra Mountains]] in the region where [[Germany]], [[France]] and [[Switzerland]] meet.
9: ...', ''Dogger'' and ''Malm''. The [[faunal stage]]s from youngest to oldest are:
71: ...]] the first [[Aves|birds]] [[Evolution|evolved]] from small [[coelurosaur]] dinosaurs. All these bel...
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