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QUESTION

# What does lead(ii) oxide mean?

A Lead(ii) ion means that the ion is Pb^(2+) -with a 2+ charge. (and when you see lead(iv), it has a Pb^(4+) ion)
Pb^(2+) + O^(2-) -> PbO
lead(ii) ion + oxygen ion -> lead(ii) oxide.
(If it was lead(iv) oxide, this would be the equation: Pb^(4+) + 2O^(2-) -> PbO_2)