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When naming compounds, when is like iron and lead iron (II) or lead (IV)?
not those ones specifically, i mean like in general when is it appropriate to use the roman numerals?
2 Answers
- steve_geo1Lv 710 years agoFavorite Answer
55 is correct that you use Roman numerals when there is a possibility of more than one oxidation state. So you would not use them for calcium or sodium. This is the so-called Stock system. In another system you may meet, iron(II) is ferrous, and iron(III) is ferric. Lead(II) is plumbous, and lead(IV) is plumbic.
- 10 years ago
Every time you are combining elements with more than one charge, with a non metal, you would use roman numerals.
