What type of bond do alkenes contain?

Alkenes are characterized by the presence of at least one double bond between carbon atoms. This double bond consists of one sigma bond and one pi bond, which results from the overlap of p-orbitals. The arrangement of the double bond causes alkenes to exhibit specific properties, such as being more reactive than alkanes (which contain only single bonds) due to the presence of the pi bond. This reactivity is crucial in various chemical reactions, including addition reactions where atoms or groups can be added across the double bond.

While it is true that alkenes also contain covalent bonds, this aspect alone does not define their unique chemical behavior. Therefore, the distinction of having double bonds is the defining feature of alkenes, making the identification of these bonds essential in organic chemistry.