Compounds with the same molecular formula but different structural formulae are called
- A. isotopes
- B. isomers
- C. homologues
- D. allotropes
Explanation
Isomers share the molecular formula but differ in how the atoms are connected or arranged in space, so they are genuinely different substances with different properties. Butane and 2-methylpropane both have the formula C4H10 yet boil at different temperatures. Homologues differ by CH2 and so have different molecular formulae.