* Lithium oxide (Li₂O)
* Sodium oxide (Na₂O)
* Potassium oxide (K₂O)
* Rubidium oxide (Rb₂O)
* Cesium oxide (Cs₂O)
These are all examples of simple oxides, where the alkali metal has a +1 charge and oxygen has a -2 charge.
Important Note: Alkali metals are highly reactive and tend to form different oxides with different stoichiometries (like Li₂O₂ or Na₂O₂). They react readily with water and oxygen, making them challenging to isolate in their pure oxide forms.
