How can a roman numeral in a chemical name be used to write a chemical formula?
A. The roman numeral is the charge on the nonmetal in the chemical
formula.
B. The roman numeral is the metal's oxidation state used as the
subscript on the nonmetal in the crisscross method.
C. The roman numeral is the nonmetal's oxidation state used as the
subscript on the metal in the crisscross method.
O D. The roman numeral is the subscript on the metal in the chemical
formula.