Question

Question #d16a3

Answer 1

`Mg_3(PO_4)_2`

Explanation:

Magnesium is in the group 2 of the periodic table that means that it's number of oxidation is 2+. Phosphate formula is `PO_4^(3-)`, also we can see in the lewis structure that it has a charge of 3-.

So to balance the charges Mg +2, and `PO_4` -3, the easiest way is to multiply between them, that is `+2*3=+6`, and `-3*2=-6`, and now the charges are equal. Meaning you need 3 atoms of `Mg^(2+)` and 2 molecules of `PO_4^(3-)`, for charges to be equal.