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Hydrocarbons are organic compounds made up of two elements( carbon and hydrogen) only, hence their source name. The main source of hydrocarbons is crude oil. There are many hydrocarbons. They can be classified into two main classes. The Aliphatic and the Aromatic hydrocarbons.  

Hydrocarbons are organic compounds made up of two elements( carbon and hydrogen) only, hence their source name. The main source of hydrocarbons is [[crude oil]]. There are many hydrocarbons. They can be classified into two main classes. The Aliphatic and the Aromatic hydrocarbons.  

Aliphatic hydrocarbons are composed of catenated carbon chain. In acyclic compounds, the carbon chain are straight or branched. Important families that belong to this group are the alkanes, alkenes and alkynes( HOMOLOGOUS SERIES) with members(HOMOLOGUE) examples like {methane ethane}, {ethene and propene} and {ethyne and propyne} respectively. These members are d first two members of each of the families mention above. In cyclic aliphatic compounds, the end carbon atoms of an acyclic carbon chain join together to form a ring. Example of such compounds are {cyclo propane, cyclo butane}, {cyclo propene ,cyclo butene} and {cyclo propyne and cyclo butyne} respectively.  

Aliphatic hydrocarbons are composed of catenated carbon chain. In acyclic compounds, the carbon chain are straight or branched. Important families that belong to this group are the alkanes, alkenes and alkynes (HOMOLOGOUS SERIES) with members (HOMOLOGUE) examples like {methane ethane}, {ethene and propene} and {ethyne and propyne} respectively. These members are d first two members of each of the families mention above. In cyclic aliphatic compounds, the end carbon atoms of an acyclic carbon chain join together to form a ring. Example of such compounds are {cyclo propane, cyclo butane}, {cyclo propene ,cyclo butene} and {cyclo propyne and cyclo butyne} respectively.  

Aromatic hydrocarbons are all cyclic compounds. The basic cyclic structure is the benzene ring. The are compounds that obey the system of delocalized electron. The have alternating double bonds and are stable. Due to their stability, they will not undergo addition reaction. Michel faraday was the first scientist to discorver benzene while kekule deviseed the structure. Benzene as form the major building block of all aromatic compounds. Example of such aromatic hydrocarbons include benzene, cyclobutadiene, cyclooctatetraene etc.

Aromatic hydrocarbons are all cyclic compounds. The basic cyclic structure is the benzene ring. The are compounds that obey the system of delocalized electron. The have alternating double bonds and are stable. Due to their stability, they will not undergo addition reaction. Michel faraday was the first scientist to discorver benzene while kekule deviseed the structure. Benzene as form the major building block of all aromatic compounds. Example of such aromatic hydrocarbons include benzene, cyclobutadiene, cyclooctatetraene etc.