Practice problem
If potassium has a 1+ charge, what is the other ion in the compound below? KO2KO_{2}KO2
O−O^{-}O−
O2−O^{2-}O2−
O2−O_{2}^{-}O2−
O22−O_{2}^{2-}O22−
Type a concept, like “slope” or “photosynthesis”.
