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crude oil , alkanes and the alkene and alkane homologous series…

- - - - polymers are very large chain molecules made by joining many smaller molecules together end to end
- - - - alkanes are reffered to as saturated molecules
      - the term staurated means they contain the maximum number of hydrocarbons possible , with no double or triple bonds between the carbon atoms
        
        therefor alkanes only contain single bonds
  - - - have the same general formula
      - differ in ch2 in molecular formulae from neighbouring compounds
      - have similiar chemical properties
      - Show a gradual variation in physical properties i.e. boiling and melting point
      - The general formula for the homologous series of alkanes is CnH2n+2 where n is the number of carbon atoms