2 Li + S → Li₂S

This represents the following:

* 2 Li: Two atoms of lithium (Li)

* S: One atom of sulfur (S)

* Li₂S: One molecule of lithium sulfide (Li₂S)

This reaction is an example of a combination reaction, where two elements combine to form a compound.

Important Notes:

* This reaction is highly exothermic, meaning it releases a lot of heat and can be quite vigorous.

* Lithium sulfide (Li₂S) is a white solid.

* The reaction requires appropriate safety precautions due to the reactivity of lithium and the potential for fire hazards.