How do you find the charge on a chemical formula?

To find the charge on a chemical formula, first identify the oxidation states of the individual elements based on their typical charges in compounds. Sum these oxidation states to determine the overall charge of the compound. For ionic compounds, the total positive charge from cations should balance the total negative charge from anions, resulting in a neutral compound. If the compound is polyatomic, refer to the known charge of the polyatomic ion.