Chain isomerism occurs when compounds have the same molecular formula but different arrangements of the carbon skeleton. This results in isomers with distinct physical and chemical properties even though they contain the same atoms in the same quantities.

Chain Isomerism

Chain isomerism

A molecular formula represents the number and type of atoms present in a molecule, providing a concise way to convey its composition. Unlike structural formulas, molecular formulas do not indicate the arrangement or bonds between atoms, focusing solely on the elemental makeup.

molecular formula

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