Depending upon the type of overlapping, the covalent bonds are mainly of two types: Sigma bond (σ) When a bond is formed between two atoms by the overlap of their atomic orbitals along the internuclear axis, the bond formed is called sigma bond The overlapping along the internuclear axis can take place in any one of the ways: (1) s-s overlapping Overlapping … [Read more...] about Types of Covalent Bond