Hey guys i'm pretty new here. I'm taking General Chemistry 1 for the first time and stumbled upon something i'm having a little trouble with...
So we're doing redox reactions now and have to find oxidation numbers for elements but I have a problem. I can't figure out when O is -2 and when it's -1. I know most Oxygens are -2 except for the peroxides but i can't figure out by the molecular formula which ones are peroxides. The example in my book is BaO2
. What makes this Barium Peroxide and not Dioxide?