Final answer:
Lithium donates its single valence electron to chlorine, resulting in the formation of a lithium cation (Li+) and a chloride anion (Cl-), which combine to form the ionic compound lithium chloride (LiCl).
Step-by-step explanation:
Electron configurations play a crucial role in the bonding of lithium and chlorine to form lithium chloride. Lithium, with an electron configuration of 1s²2s¹, has one valence electron. Chlorine, with an electron configuration of [Ne]3s²3p¹, has seven valence electrons and needs one more to complete its octet. To achieve stable noble gas configurations, lithium can donate its one valence electron to chlorine.
As a result, lithium becomes a lithium cation with a positive charge, Li+, and chlorine becomes a chloride anion with a negative charge, Cl-. This transfer of an electron leads to the attraction between the oppositely charged ions, resulting in an ionic bond. The formula for lithium chloride, which is formed through this ionic bond, is LiCl.