What term describes compounds that have the same chemical formula but different arrangements of atoms?

• A. Structural Formula
• B. Hydrocarbon
• C. Isomer
• D. Organic Compound

Answer: (C)

Isomers are compounds that have the same chemical formula but different arrangements of atoms. This difference in how the atoms are connected or arranged in space gives each isomer unique properties, even though the formula is the same. For example, C4H10 can be arranged as n-butane or isobutane; they share the same formula but their structures are different, so they behave differently in some reactions and at different temperatures. A structural formula is simply a way to show how atoms are connected in a molecule, not the concept of having the same formula with different arrangements. A hydrocarbon is any compound made of carbon and hydrogen, and an organic compound is a broad category that includes many kinds of carbon-containing molecules.