Names of Small Hydrocarbons No.of Carbons Formula Name (CnH2n+2) 1 Methane CHa 2 Ethane C2He 3 Propane CgHg 4 Butane CaHio 5 Pentane CgH12 6 Hexane C6H14 7 Heptane C7H16 8 Octane CgH18 9 Nonane CgH20 10 Decane C10H22Names of Small Hydrocarbons Decane C10 H22 10 Nonane C 9 H20 9 Octane C 8 H18 8 Heptane C 7 H16 7 Hexane C 6 H14 6 Pentane C 5 H12 5 Butane C 4 H10 4 Propane C 3 H 8 3 Ethane C 2 H 6 2 Methane CH 4 1 (C n H 2 n+2 No. of Carbons Formula Name )