Alkane Nomenclature(IUPAC)
1 Methane

CH4
CH4
2 Ethane

C2H6
3 Propane

C3H8
4 Butane

C4H10
5 Pentane

C5H12
 
6 Hexane

C6H14
 
7 Heptane

C7H16
 
8 Octane

C8H18
 
9 Nonane

C9H20
 
10 Decane

C10H22
 
       
20 Icosane

C20H42