- It's Elemental: Chromium - http://education.jlab.org/itselemental/ele024.html
- Basic physical and historical information.
- ChemicalElements.com: Chromium - http://www.chemicalelements.com/elements/cr.html
- Basic information, atomic structure, and isotopes.
- USGS Minerals Information: Chromium - http://minerals.usgs.gov/minerals/pubs/commodity/chromium/
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- Visual Elements: Chromium - http://www.chemsoc.org/viselements/pages/chromium.html
- General and physical information, source, uses, key isotopes, and ionisation energies.
- EnvironmentalChemistry.com: Chromium - http://environmentalchemistry.com/yogi/periodic/cr.html
- Atomic structure, chemical and physical properties, and table of nuclides.
- Lenntech: Chromium - http://www.lenntech.com/periodic-chart-elements/cr-en.htm
- Physical data, chemical properties, health and environmental effects.
- Wikipedia: Chromium - http://en.wikipedia.org/wiki/chromium
- Properties of the element, including its history, applications, and characteristics.
- LANL: Chromium - http://periodic.lanl.gov/elements/24.html
- History, sources, uses, and compounds.
- ChemGlobe: Chromium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/24.html
- Electronic, thermal, and steric data along with an isotopes table.
- WebElements: Chromium - http://www.webelements.com/webelements/elements/text/cr/key.html
- Extensive information on history, uses, occurrence, compounds, and properties of the element.
- Radiochemistry of Chromium - http://library.lanl.gov/cgi-bin/getfile?rc000002.pdf
- Full text of the monograph by J. Pijck (Laboratory for Analytical Chemistry, University of Ghent, Ghent, Belgium).
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