Calcium is a photograph by which was uploaded on May 2nd, 2013.
Calcium
Calcium. Sample of the alkaline earth metal calcium (Ca) on a watch glass. Calcium is the fifth most abundant element in the Earth's crust. It is... more
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Calcium
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Calcium. Sample of the alkaline earth metal calcium (Ca) on a watch glass. Calcium is the fifth most abundant element in the Earth's crust. It is essential for living organisms where, among other uses, it is used for constructing bones and shells.
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May 2nd, 2013