The chemical compound formula formed between lithium (Li) and chlorine (Cl) is LiCl, which is called lithium chloride.

Here's why:

* Lithium is in group 1 of the periodic table, meaning it has a +1 charge as a cation (Li+).

* Chlorine is in group 17 of the periodic table, meaning it has a -1 charge as an anion (Cl-).

* To form a neutral compound, one lithium ion (Li+) combines with one chlorine ion (Cl-) resulting in the formula LiCl.