Alkenes Nomenclature(IUPAC)
2 Ethylene
Ethene


C2H4
3 Propylene
Propene


C3H6
4 Butene

C4H8
1-Butene
cis-2-Butene
trans-2-Butene
5 Pentene

C5H10
1-Pentene
cis-2-Pentene    
trans-2-Pentene    
6 hexene

C6H12
1-Hexene
cis-2-Hexene
trans-2-Hexene
cis-3-Hexene
trans-3-Hexene
7 heptene

C7H14
 
 
8 octene

C8H16
 
 
9 nonene

C9H18
 
 
10 decene

C10H20