# What is the ionic compound formula of sodium phosphate?

Sodium Phosphate is an ionic compound formed by two ions, Sodium $N {a}^{+}$ and Phosphate $P {O}_{4}^{-} 3$.
In order for these two polyatomic ions to bond the charges must be equal and opposite. Therefore, it will take three +1 sodium ions to balance the one -3 phosphate ion. This will make the formula for Sodium Phosphate $N {a}_{3} P {O}_{4}$.