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20 Ca Calcium

Alkaline earth metal, mass: 40.078 u, 5 stable isotopes (40, 42, 43, 44, 46), abundance rank (earth/space): 5/13

Click image to magnify. 0.5 grams calcium pieces. Original size per piece in cm: 0.1
Calcium Calcium pieces
Calcium is a very abundant element, which in nature above all occurs as calcium carbonate (CaCO3, lime) and calcium sulfate (CaSO4, gypsum). Elemental calcium is a grey metal, that slowly reacts with air and fiercely reacts with water. For humans and animals it is first of all important, because bones, teeth and exoskeletons to a large part consist of calcium compounds like tricalcium phosphate and calcium carbonate.

Shell
A seashell is largely made of CaCO3.


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The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking (outside of the internet credit with url) to the according element page.


Page last changed on March 05. 2016

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