Chlorine forms a single covalent bond in Cl₂ by sharing a pair of electrons between two chlorine atoms, each contributing one electron. This bond satisfies the octet rule for both chlorine atoms, allowing them to achieve stability.
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Chlorine forms a single covalent bond in Cl₂ due to the sharing of one pair of electrons between two chlorine atoms. Each chlorine atom has seven electrons in its outer shell and requires one more electron to achieve a stable, full valence shell with eight electrons. By sharing one electron from each chlorine atom, they both attain the electron configuration of a noble gas (argon). This single covalent bond satisfies the octet rule, providing both chlorine atoms with a complete outer shell. The resulting molecule, Cl₂, is diatomic and stable, with each chlorine atom contributing one electron to the shared bond.