The basic form for the names of Type II ionic compounds is to have name of the metal cation first , followed by the metal cation in parenthesis using roman numerals , and finally base name of the metal anion with -ide attached the end of it .
Roman numerals are needed of the ionic compounds to represent the oxidation state of the transition metals . Transition metals are exhibited various oxidation state . For ionic compound the Roman numerals is equal to the charge on the ion .
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