What type of oxides do alkali metals form? Di | vedclass

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(A) Alkali metals react with oxygen to form different types of oxides depending on the metal.Lithium forms mainly the oxide $Li_{2}O$ (with some perox

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Basic oxides

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(A) Alkali metals react with oxygen to form different types of oxides depending on the metal.Lithium forms mainly the oxide $Li_{2}O$ (with some peroxide $Li_{2}O_{2}$).Sodium forms the peroxide $Na_{2}O_{2}$ in excess air.Potassium,rubidium,and cesium form superoxides of the type $MO_{2}$ in excess air.The stability of peroxides and superoxides increases as the size of the metal ion increases,due to the stabilization of large anions by large cations through lattice energy effects.In their pure state,oxides and peroxides are colorless,whereas superoxides are yellow or orange in color.Superoxides are paramagnetic in nature. Sodium peroxide is widely used as an oxidizing agent.

What type of oxides do alkali metals form? Discuss some of the physical properties of these oxides.

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