Question

multiple - choice question
what is the chemical formula of calcium phosphate?
ca3(po4)2
ca4po
ca2po12
capo4

Explanation:

Calcium has a +2 charge ($Ca^{2+}$) and phosphate is the poly - atomic ion $PO_{4}^{3 - }$. To balance the charges, we need 3 calcium ions to balance 2 phosphate ions. So the chemical formula is $Ca_{3}(PO_{4})_{2}$.

Answer:

A. $Ca_{3}(PO_{4})_{2}$