You gots "peroxide dianion"peroxide dianion...........
Explanation:
And a Lewis structure for ""^(-)O-O^-−O−O−, which clearly derives from hydrogen peroxide, H-O-O-HH−O−O−H, which is......
There were 2xx1(H) + 2xx6(O)2×1(H)+2×6(O)valence electrons, i.e. 7 electron pairs to distribute over 4 centres. What is the oxidation state of oxygen in this molecule?