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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.


Creative Commons License The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking to the according element page.


Page last changed on January 19. 2010

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