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Whenever the element has multiple oxidation states (charges) that cannot be implied from the element name alone. This mostly applies to the transition metals, including some lanthanides and actinides, with notable exceptions being zinc, silver and cadmium. However, poor metals such as tin, lead and bismuth also require Roman numerals.
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Earn +20 ptsQ: When do elements get a roman numeral?
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Continue Learning about Math & Arithmetic
What is the Roman numeral for 101?
the answer to what is the roman numeral for 101 is CI
What is the Roman numeral for XXV?
XXV is the Roman Numeral for 25
Roman numeral should be used when naming which compounds?
Compounds which contain transition elements. cu2so4
What is the Roman numeral for 324?
324 written in roman numeral is CCCXXIV
Is K a Roman numeral?
No, K is not a roman numeral.
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