Fluorine

http://en.wikipedia.org/wiki/Fluorine (Rank: 356969)

http://www.chemicalelements.com/elements/f.html (Rank: 522902)

http://education.jlab.org/itselemental/ele009.html (Rank: 598810)

http://periodic.lanl.gov/elements/9.html (Rank: 902366)

http://www.lenntech.com/Periodic-chart-elements/F-en.htm (Rank: 1728442)

http://environmentalchemistry.com/yogi/periodic/F.html (Rank: 2306732)

http://www.chemsoc.org/viselements/pages/fluorine.html (Rank: 2390828)

http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/9.html (Rank: 2824277)

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