Calcium


 * Element Name**: 20


 * Element Symbol**: CA


 * Atomic Mass**: 40 [[image:calcium_Alexandra.png width="216" height="288" align="right"]]


 * Atomic Number**: 20


 * Protons**: 20


 * Electrons**: 20


 * Discovery**: Sir Humphry Davy in 1808.


 * How It Was Named**: From the Latin word lime, calx.


 * State Of Matter**: Solid


 * Melting Point**: 842°C


 * Boiling Point**: 1484°C


 * Characteristics**: Color: Dull gray, Sliver. Calcium reacts with water. Density: 1.55g/cm3


 * Uses Of Element**: In the making of brick cements and dry walls.

Influence the activity of rennin in bringing about the coagulation of milk.
 * Interesting Facts**: Most abundant element in the earth's crust. In the making of cheese, where calciun ions.

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