how do the fractions sodium and potassium with oxygen give the formula reaction .
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Lithium (and to some extent sodium) form simple oxides, X2O, which contain the common O2- ion. Sodium (and to some extent potassium) form peroxides, X2O2, containing the more complicated O22- ion (discussed below). Potassium, rubidium and caesium form superoxides, XO2....
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Production. Potassium oxide is produced from the reaction of oxygen and potassium; this reaction affords potassium peroxide, K2O2. Treatment of the peroxide with potassium produces the oxide: K2O2 + 2 K → 2 K2O....
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