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Compounds which contain transition elements.

cu2so4

Q: Roman numeral should be used when naming which compounds?

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The charge.

when you are using the Stock Naming System

antony

No. Roman numerals are only for cations that aren't in either group 1 or 2. For this, you would say Chlorine Tetroxide.

'lxxxv' is not a Roman Numeral. Roman numerals are written as CAPITAL letters. It should be LXXXV = 85.

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Cu2So4

The charge.

when you are using the Stock Naming System

antony

they are used to naming quadrents in grafs and subtitues for numbers

No. Roman numerals are only for cations that aren't in either group 1 or 2. For this, you would say Chlorine Tetroxide.

'lxxxv' is not a Roman Numeral. Roman numerals are written as CAPITAL letters. It should be LXXXV = 85.

Roman numeral placed in parentheses after the name of the transition metal.

1 is not a Roman numeral, you numeral should be written as XVIII and it represents the number 18

You use it on every single element

When naming compounds. For example, Iron (VI) Carbonate.

The Roman numeral is XVI. There should be a bar over the X to indicate 10000.