| A | B | 
| Alkanes | contain carbon-carbon single bonds only | 
| Alkenes | Contain carbon-carbon double bonds | 
| four | number of bonds formed by carbon | 
| buta | prefix(begining) for name of 4 carbon atoms in molecule | 
| eth | prefix(begining) for name of 2 carbon atoms in molecule | 
| hepta | prefix(begining) for name of 7 carbon atoms in molecule | 
| penta | prefix(begining) for name of 5 carbon atoms in molecule | 
| saturated | alkanes are ...........hydrocarbons | 
| unsaturated | alkenes are ............. hydrocarbons | 
| ethene | C2H4 | 
| propane | C3H8 | 
| hydrocarbon | Contains carbon and hydrogen only |