General formula
Simplest algebraic formula of a member of a homologous series e,g Alkanes CnH2n+2
Alkane
Hydrocarbon homologous series with single carbon to carbon bonds
CnH2n+2
Alkenes
The hydrocarbon homologous series with at one double carbon to carbon bond and the general formula CnH2n
Hydrocarbon
Compound of hydrogen and carbon only
Homologous series
A series of organic compound with same functional group but with each successive member differing by CH2
Functional group
The part of molecule that is responsible for chemical reactivity