Radial: A word with diverse meanings in medicine and the biomedical sciences: 1  Pertaining to the radius, the smaller bone in the forearm. 2  The radial artery is so named because of its proximity to the radius. 3  Pertaining to the radius of a circle.
A 3D model of ethyne (acetylene), the simplest alkyne. In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbonâcarbon triple bond. The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula CnH2nâ2.
Alkenes: Nomenclature. An alkene is a hydrocarbon characterized by a double bond between two constituent carbon atoms. Obviously, the name alkene is very close to alkane, and for good reason. Consider, for instance, ethane (an alkane having two carbon atoms) versus ethene (an alkene having two carbon atoms):