+A sigma bond is the strongest type of [covalent bond](/wiki/covalent_bond), formed by the direct, head-on overlap of [atomic orbitals](/wiki/atomic_orbital). This direct overlap creates a single bond that permits free rotation of the bonded atoms, forming the backbone of most molecules.
+## See also
+- [Pi Bond](/wiki/pi_bond)
+- [Delta Bond](/wiki/delta_bond)
+- [Molecular Orbital](/wiki/molecular_orbital)
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