This is a chemical reaction, and the equation for it is:

4Li + O2 → 2Li2O

Here's a breakdown:

* Lithium (Li) is a highly reactive alkali metal.

* Oxygen (O2) is a highly reactive non-metal.

* Lithium oxide (Li2O) is an ionic compound where lithium has a +1 charge and oxygen has a -2 charge.

Lithium oxide is a white solid that is used in various applications, including:

* Ceramics: It is used in the production of glass and ceramic materials.

* Batteries: It can be used as an electrolyte in lithium-ion batteries.

* Lubricants: It can be used as a high-temperature lubricant.

Important Note: This reaction is highly exothermic, meaning it releases a lot of heat. It should be conducted with caution and in a controlled environment.