Oxides, classification of oxides, properties of oxides.

Oxide is a class of chemical compounds in which oxygen combines with another element. With the exception of the lighter inert gases (helium [He], neon [Ne], argon [Ar] and krypton [Kr]), oxygen (O) forms at least one double oxide with each of the elements.

Metals and non-metals can reach their highest oxidation state (that is, donate their maximum number of available valence electrons) in conjunction with oxygen.

In alkali metals and alkaline earth metals, as well as transition metals (after the start of transformations in their lower oxidation states), ionic oxides are formed.



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