Sigma bonds are formed as a result of the overlapping of which type of atomic orbital

Sigma bonds are formed as a result of the overlapping of atomic orbitals that overlap end-to-end.

Explanation:

Sigma bonds are formed by the end-to-end overlap of hybrid orbitals with hybrid orbitals, hybrid orbitals with non-hybrid orbitals and non-hybrid orbitals with non-hybrid orbitals. The most common combinations that produce sigma bonds are:

Hybrid orbitals - Hybrid orbitals

Hybrid orbitals - Non-Hybrid orbitals

Non-Hybrid orbitals - Non-Hybrid orbitals

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