Answer
Roman numerals tell us what the charge on the ion of that atom is. Roman numerals are placed after most of the transition metals when they form compounds to define what oxidation number is used in this particular compound because transition metals often have more than one oxidation number.
Work Step by Step
Roman numerals tell us what the charge on the ion of that atom is. Roman numerals are placed after most of the transition metals when they form compounds to define what oxidation number is used in this particular compound because transition metals often have more than one oxidation number.
