HOMOLOGUES: Members of a given series which differ from each preceding member by a CH2-(Methylene) unit Alkanes CH4, CH3 CH3, CH3 CH2 CH3, etc Acids HCO2H, CH3CO2H, CH3CH2 CO2H, etc ALKYL- Some organic hydrocarbon substituent generally designated as R CH3-; CH3CH2 LIYING 2021/2/10LIYING 2021/2/10 HOMOLOGUES : Members of a given series which differ from each preceding member by a - CH2- (Methylene) unit. Alkanes CH4, CH3CH3, CH3CH2CH3, etc Acids HCO2H, CH3CO2H, CH3CH2CO2H, etc ALKYL - Some organic hydrocarbon substituent, generally designated as R- CH3- ; CH3CH2-