Nickel

http://en.wikipedia.org/wiki/Nickel (Rank: 247756)

http://www.chemicalelements.com/elements/ni.html (Rank: 895950)

http://www.lenntech.com/Periodic-chart-elements/Ni-en.htm (Rank: 1138468)

http://periodic.lanl.gov/elements/28.html (Rank: 1378982)

http://education.jlab.org/itselemental/ele028.html (Rank: 1384060)

http://minerals.usgs.gov/minerals/pubs/commodity/nickel/ (Rank: 1981955)

http://www.webelements.com/webelements/elements/text/Ni/key.html (Rank: 2158573)

http://library.lanl.gov/cgi-bin/getfile?rc000008.pdf (Rank: 2161149)

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

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

http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/28.html (Rank: 2824277)

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