when is a roman numeral most likely needed in the name of an ionic compound?\no when more than one…

when is a roman numeral most likely needed in the name of an ionic compound?\no when more than one polyatomic ion appears\no when the anion is a polyatomic ion\no when more than one cation is used in the formula\no when the cation is a transition metal

when is a roman numeral most likely needed in the name of an ionic compound?\no when more than one polyatomic ion appears\no when the anion is a polyatomic ion\no when more than one cation is used in the formula\no when the cation is a transition metal

Answer

Brief Explanations:

Transition metals can have multiple oxidation states. Roman numerals are used in the names of ionic compounds to indicate the oxidation state of the transition - metal cation.

Answer:

when the cation is a transition metal