Calcium



Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.[4] Free calcium metal is too reactive to occur in nature. Calcium is produced in the explosions at the end of the life of massive stars

Calcium is essential for living organisms, in particular in cell physiology, where movement of the calcium ion into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bone, teeth and shells, calcium is the most abundant metal by mass in many animals.

Is used for


 * as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium.

as a deoxidizer, desulfurizer, or decarbonizer for various ferrous and nonferrous alloys.

as an alloying agent used in the production of aluminium, beryllium, copper, lead, and magnesium alloys.

in the making of cements and mortars to be used in construction.

in the making of cheese, where calcium ions influence the activity of rennin in bringing about the coagulation of milk. Calcium is traded like any other mineral in its raw form on the XChange and a common goofs item.
 * As food supplement for many Carbon based life forms including humans.
 * Vital compount to Bandrupo nutrition and well ebing
 * Food delicacy for the Takians