Alkanes and AlkenesWatch this thread
Any Cyclo Alkanes can form the same structural formula with Alkene, as Alkene bonds with 2 Hydrogens, and Cyclo Alkanes bonds with 2 Hydrogen also. Hence what ever the structure, you will still see the same Molecular Formula, it’s only the layout that changes
Essentially, they form isomers because we can sort of move groups around the molecule without changing the molecular formula of the molecule. For instance, with butene, the C=C bond can be at the end of the chain and at the middle (e.g. between the 2nd and 3rd carbons in the chain).