《化学笔记》woodywood

2、homologous series

　　The alkanes form a series of compounds all with the general formula: CnH(2n+2)

　　If one of the hydrogen atoms is removed what is left is known as an alkyl radical R-
　　When other atoms or groups are attached to an alkyl radical they can form a different series of compounds.
　　！！！These atoms or groups attached are known as functional groups and the series formed are all homologous series.！！！

　　The chemical properties of the individual members of a homologous series are similar and they show a gradual change in physical properties.