What compound do calcium and phosphate form and what is the chemical formula?

Answer 1

Strangely enough - it's called Calcium Phosphate.

Calcium ions are +2 charge (Ca2+) because it is a group 2 metal, and readily loses 2 electrons.

The phosphate ion has a 3+ charge (it's PO43+)

And so the formula must be Ca3(PO4)2

This is sometimes known as 'tricalcium phosphate', but that's really more detail than you need from a name!

Answer 2

Calcium and phosphate form calcium phosphate, with the chemical formula Ca3(PO4)2. This compound is a major component of teeth and bones in the human body.