In organic chemistry, the term “catenation” is used to refer to the bonding of atoms of the same element into a series . Also known as the tendency of self-combination. This takes place most readily with carbon atoms . Carbon atoms can form long chains by sharing their valence electrons with other carbon atoms . This is not to say that carbon is the only element capable of forming such a chain; other elements capable of catenation include hydrogen, boron, silicon, phosphorous, sulfur, and halogens.