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Anne Marie Helmenstine, Ph.D.

Anne Marie's Chemistry Blog

By Anne Marie Helmenstine, Ph.D., About.com Guide to Chemistry

Calcium Facts

Saturday January 21, 2006
Do you know what elemental calcium looks like? You've probably never seen it, since none of the alkaline earth metals occur free in nature. The pure metal is silvery-white and soft. Calcium compounds are very common, and calcium is the fifth most abundant element in the earth's crust. Tell me more...
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