The formula of chlorine is Cl2.
Chlorine does not exist as single chlorine atoms (Cl) in nature. Instead, it exists as a diatomic molecule, meaning two chlorine atoms are chemically bonded together. This bonding occurs because a single chlorine atom has seven valence electrons and needs one more electron to achieve a stable octet. By bonding with another chlorine atom, both atoms can share electrons and achieve a stable electron configuration.
Therefore, the correct and complete formula for chlorine is Cl2.
