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WSS
Roman numeral is used to mark valence. If an atom, or metal atom has only one valence, you can spare writing it
Lead(IV) Chloride
For the transition metals, the roman numeral designates the valence number of the metal in the ionic bond. For example CuSO4 is Copper (II) Sulfate, because the copper has a valence of +2 in this bond.
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A roman numeral in parentheses follows the name of the metal... apex
WSS
Roman numeral placed in parentheses after the name of the transition metal.
Roman numeral is used to mark valence. If an atom, or metal atom has only one valence, you can spare writing it
Lead(IV) Chloride
Because transition metals can assume more than one charge, the transition metal ion is named by using a Roman numeral
For the transition metals, the roman numeral designates the valence number of the metal in the ionic bond. For example CuSO4 is Copper (II) Sulfate, because the copper has a valence of +2 in this bond.
LXX.
The name Claudio cannot be formed from Roman numerals as, even if you replaced the letter 'u' with the numeral V, there is no Roman numeral with the symbol 'a.'
The bar in Roman Numerals is named vinculum. This bar is placed above a Roman Numeral and indicates a multiple of 1000. The Romans did not use this name for the bar, it was introduced in the Middle Ages.
XX is the Roman numeral for 20