Answer:
Roman numerals in a chemical formula indicate the charge on the metal cation before them. They are used in situations where the multiple oxidation states are available to the metal. For example, iron can be both 2+ and 3+, so to distinguish between the two, we use iron (II) and iron (III) respectively.
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Answer:
d) the roman numeral is the metal's oxidation state used as the subscript on the nonmetal in the crisscross method
Explanation:
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