Calcium

=Calcium= By: Kunj


 * Atomic Number:** 20


 * Protons:** 20


 * Electrons:** 20


 * Neutrons:** 20


 * Average Atomic Mass:** 40.078 amu


 * Discovery:** Calcium was discovered by Sir Humphry Davy in 1808.


 * Name:** Calcium was named from the Latin word //calx//, which means lime.
 * Uses:** Calcium was used to separate sulfer, carbon, and oxygen from certain alloys. It is also used in vacuum tubes as a material that combines and removes traces of gases from the vacuum tubes.


 * Interesting Facts**: Calcium as an element is a silvery grey metal. Calcium is very hard and is the fifth most abundant element in the earths crust, and makes up more than 3% of the earth's crust. Calcium is found in leaves, bones, teeth, and shells. Instead of occuring as a metal itself, Calcium is found in limestone, gypsum, and flourite.
 * Picture:**




 * Sources**
 * Photo:google images
 * Video:creative commons advanced search
 * Facts:Webelements
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