What do we call the #O_2^(2-)# ion?

1 Answer
anor277
Aug 31, 2017

You gots #"peroxide dianion"#...........

Explanation:

And a Lewis structure for #""^(-)O-O^-#, which clearly derives from hydrogen peroxide, #H-O-O-H#, which is......

![http://chem.ucla.edu](https://useruploads.socratic.org/wiVkayCARgOrcCGogSTu_h202_1.png)

There were #2xx1(H) + 2xx6(O)# valence electrons, i.e. 7 electron pairs to distribute over 4 centres. What is the oxidation state of oxygen in this molecule?

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