Hi there! I have a quick question that could use some clarification. According to my textbook, an oxygen atom has an oxidation state of -1 when in the polyatomic ion peroxide, although it's -2 in most other cases. However, I've come across this problem where it asks for the oxidation state of Ti in the compound TiO2. I figured it was +2 since each oxygen atom carries an oxidation state of -1 (because it's a peroxide) and -1(2) is -2, so Ti must have an oxidation state of +2, right? But then when I try to ease my qualms, every single post on the Internet points toward an oxidation state of +4. I don't understand! Is this titanium peroxide or titanium dioxide? Any help would be greatly appreciated.