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What would the formula be for titanium iv oxygen? Would it be TiO2?
Yes, this is the ##TiO_2## is the correct formula for Titanium (IV) oxide.
The roman numeral IV means the titanium forms a cation with a +4 charge by losing 4 electrons.
The oxygen atoms gain two electrons and form an anion with a -2 charge.
The ratio for the in the compound must be 1:2 because titanium gives up 4 electrons and each oxygen can accept two electrons.