5. Name the element which forms (i) peroxide, (ii) superoxide.
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Sodium (and to some extent potassium) form peroxides, X2O2, containing the more complicated O2−2 ion. Potassium, rubidium and cesium form superoxides, XO2. containing the superoxide ion, O−2.
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Sodium (and to some extent potassium) form peroxides, X2O2, containing the more complicated O2−2 ion. Potassium, rubidium and cesium form superoxides, XO2. containing the superoxide ion, O−2.
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