# What is the ionic compound formula of sodium sulfate?

Sodium Sulfate is an ionic compound formed by two ions, Sodium $N {a}^{+}$ and Sulfate $S {O}_{4}^{-} 2$.
In order for these two polyatomic ions to bond the charges must be equal and opposite. Therefore, it will take two +1 sodium ions to balance the one -2 sulfate ion. This will make the formula for Sodium Sulfate $N {a}_{2} S {O}_{4}$.