What is a functional group isomer?
They have the same molecular formula but have different functional groups.
What is a positional isomer?
Isomers with the same carbon skeleton and functional group. But different position of the functional groups on the carbon chain.
What is chain isomerism?
When the hydrocarbon chain is arranged differently (such as branching).
What is an isomer?
Compounds with the same molecular formula but different structural formulas