What are alkenes?
Alkenes are hydrocarbons with at least one carbon-to-carbon double bonding.
Examples of alkenes (note the double bonds)
The double bonds of a hydrocarbon can exist in different position
Below is the first position double bonding
Below are alkenes with second position double bonding
The general formula for alkenes is:
There are twice as many hydrogen atoms as carbon.
Alkenes are unsaturated hydrocarbons
Unlike alkanes, alkenes are unsaturated compounds. They are unsaturated because they can make room for more hydrogen atoms by breaking the double bonds. They don't carry the maximum possible number of hydrogen atoms.
What are isomers?
Isomers are basically molecules that have the same formula but different arrangement of atoms
Below is an example of butene which has 3 different isomers