What substances are called oxides? Give examples of several oxides. What is the valence of oxygen atoms in oxides?

In chemistry, oxides are called complex compounds, which contain an element, as well as an oxygen atom. The oxygen atom always has a valence of 2. Let us write down the following oxides as an example.

MgO is magnesium oxide.

K2O – called potassium oxide.

Na2O – called sodium oxide.

CO2 – called carbon monoxide.

Fe2O3 – iron oxide.

Also, oxides can be divided into acidic and basic. Acidic include those that form acids. And the main ones include those that form the bases.

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