Calcium: Difference between revisions
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imported>Chris Day No edit summary |
imported>Supten Sarbadhikari No edit summary |
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|no3= | |no3= | ||
|no4= | |no4= | ||
|properties= | |properties=Metallic | ||
|compounds= | |compounds=combined with phosphate to form hydroxylapatite, oxide (lime), carbonate, nitrate, sulfide, chloride, carbide, cyanamide, hypochlorite | ||
|uses= | |uses=as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium; as a deoxidizer, desulfurizer, or decarbonizer for various ferrous and nonferrous alloys; as an alloying agent used in the production of aluminium, beryllium, copper, lead, and magnesium alloys; in the making of cements and mortars to be used in construction; in the making of cheese, where calcium ions influence the activity of rennin in bringing about the coagulation of milk. | ||
|hazard= | |hazard=flammable | ||
}} | }} | ||
'''Calcium''' is the chemical element with the symbol Ca and atomic number 20. | '''Calcium''' is the chemical element with the symbol Ca and atomic number 20. | ||
Calcium is essential for [[life]], particularly in [[cell]] [[physiology]], where movement of the calcium ion Ca<sup>2+</sup> into and out of the cytoplasm functions as a signal for many cellular processes, including neuromuscular contractions. It is also a major material used in mineralization of bones, teeth and shells. | Calcium is essential for [[life]], particularly in [[cell]] [[physiology]], where movement of the calcium ion Ca<sup>2+</sup> into and out of the cytoplasm functions as a signal for many cellular processes, including neuromuscular contractions. It is also a major material used in mineralization of bones, teeth and shells. | ||
Revision as of 00:26, 1 October 2008
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Calcium is the chemical element with the symbol Ca and atomic number 20.
Calcium is essential for life, particularly in cell physiology, where movement of the calcium ion Ca2+ into and out of the cytoplasm functions as a signal for many cellular processes, including neuromuscular contractions. It is also a major material used in mineralization of bones, teeth and shells.