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 and sulfur
calcium carbonate
Calcium
mostly calcium
calcium carbonate
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
chalk is made up of the mineral calcium carbonate.
Calcium phosphate makes up the solid structure of the bone.
Calcium is an element, so calcium makes up calcium.
All the bones in the human body is made up of calcium.