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Wikipedia: Calcium - http://en.wikipedia.org/wiki/Calcium
Properties of the element, including its history, applications, and characteristics. |
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WebElements: Calcium - http://www.webelements.com/webelements/elements/text/Ca/key.html
Extensive information on history, uses, occurrence, compounds, and properties of the element. |
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LANL: Calcium - http://periodic.lanl.gov/elements/20.html
History, sources, properties, uses, and compounds. |
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ChemicalElements.com: Calcium - http://www.chemicalelements.com/elements/ca.html
Basic information, atomic structure, and isotopes. |
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It's Elemental: Calcium - http://education.jlab.org/itselemental/ele020.html
Basic physical and historical information. |
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EnvironmentalChemistry.com: Calcium - http://environmentalchemistry.com/yogi/periodic/Ca.html
Atomic structure, chemical and physical properties, and table of nuclides. |
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Visual Elements: Calcium - http://www.chemsoc.org/viselements/pages/calcium.html
Image, animation, source, uses, and physical information. |
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ChemGlobe: Calcium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/20.html
Electronic, thermal, and steric data along with an isotope table. |
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Lenntech: Calcium - http://www.lenntech.com/Periodic-chart-elements/Ca-en.htm
Physical data, chemical properties, and health effects. |