Here's why:
* Lithium is a metal and forms a cation (Li+).
* Chlorine is a non-metal and forms an anion (Cl-).
* When a metal and non-metal combine, they form an ionic compound.
* The naming convention for ionic compounds is to use the metal name followed by the non-metal name with the suffix -ide.
Therefore, the compound containing lithium and chlorine is called lithium chloride.
