Get your Ca! It is VERY important! Calcium is an element well known it can be found in milk to build strong bones!
Common compounds include : calcium carbide, calcium chloride, and calcium phosphide
If you are interested contact Sir Humphrey Davy!
Calcium was discovered by Sir Humphrey Davy in 1808. It has been around since the 1st century. Ancient romans were known to make lime from calcium oxide. They used it in cement form. Sir Humphrey Davy isolated the element itself.