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Visual Elements: Calcium
Image, animation, source, uses, and physical information. (infos)It's Elemental: Calcium
Basic physical and historical information. (infos)
ChemicalElements.com: Calcium
Basic information, atomic structure, and isotopes. (infos)
Calcium
Data tables and historic information. (infos)
EnvironmentalChemistry.com: Calcium
Atomic structure, chemical and physical properties, and table of nuclides. (infos)
WebElements: Calcium
Extensive information on history, uses, occurrence, compounds, and properties of the element. (infos)
Lenntech: Calcium
Physical data, chemical properties, and health effects. (infos)
Wikipedia: Calcium
Properties of the element, including its history, applications, and characteristics. (infos)
LANL: Calcium
History, sources, properties, uses, and compounds. (infos)
ChemGlobe: Calcium
Electronic, thermal, and steric data along with an isotope table. (infos)