<P> An isomer ( / ˈaɪsəmər / ; from Greek ἰσομερής , isomerès ; isos = `` equal '' , méros = `` part '' ) is a molecule with the same molecular formula as another molecule , but with a different chemical structure . That is , isomers contain the same number of atoms of each element , but have different arrangements of their atoms . Isomers do not necessarily share similar properties , unless they also have the same functional groups . There are two main forms of isomerism ( / ˈaɪsəmərɪzm / or / aɪ ˈsɒmərɪzm / ) : structural isomerism ( or constitutional isomerism ) and stereoisomerism ( or spatial isomerism ) . </P>
<P> An isomer ( / ˈaɪsəmər / ; from Greek ἰσομερής , isomerès ; isos = `` equal '' , méros = `` part '' ) is a molecule with the same molecular formula as another molecule , but with a different chemical structure . That is , isomers contain the same number of atoms of each element , but have different arrangements of their atoms . Isomers do not necessarily share similar properties , unless they also have the same functional groups . There are two main forms of isomerism ( / ˈaɪsəmərɪzm / or / aɪ ˈsɒmərɪzm / ) : structural isomerism ( or constitutional isomerism ) and stereoisomerism ( or spatial isomerism ) . </P>
explain why isomers have different chemical and physical properties
explain why isomers have different chemical and physical properties
isomers contain the same number of atoms of each element , but have different arrangements of their atoms
isomers contain the same number of atoms of each element , but have different arrangements of their atoms