What is the ionic compound formula of magnesium nitrate?

Magnesium Nitrate is an ionic compound formed by Magnesium ##Mg^+2## the cation and Nitrate ##NO_3^-## the polyatomic anion.

In order for these two ions to bond the charges must be equal and opposite. Therefore, it will take two -1 nitrate ions to balance the one +2 magnesium ion. This will make the formula for Magnesium Nitrate ##Mg(NO_3)_2##.

I hope this was helpful. SMARTERTEACHER