Considering the predicted series of compounds C7,H2,,+2, which is the well-known homologous series of methane, the first member, the possible of isomerism lies in that of a different linking of the carbon atoms. This first presents itself when four are present, i.e.
linking הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד