Calcium is an element, not a compound. It's not made up of other things, it just is. Unless you mean on a subatomic level, in which case it's made up of protons, neutrons and electrons, like everything else.
Calcium is an element, so calcium makes up calcium.
Calcium and sulfur
calcium carbonate
Calcium
mostly calcium
calcium carbonate
The formula is CaI2 and is made of the elements calcium (Ca) and iodine (I).
calcium
Calcium Carbonate Plates
Calcium is an element. Therefore it makes chemicals up, not the other way aound. Common Ca compounds are CaCO3, calcium carbonate, and CaO Calcium oxide
Calcium it's calcium here's proof if u don't trust me http://www.webelements.com/calcium/
chalk is made up of the mineral calcium carbonate.