# What kind of chemical bond is formed when an equal exchange of electrons occurs?

For instance, consider $C {O}_{2}$
In the orbital diagram, the carbon atom has two $\text{sp}$ hybridized orbitals and two unhybridized $\text{p}$ orbitals. The former are used to create $\sigma$ bonds and the latter to create $\pi$ bonds with oxygen atoms to optimally share electrons.