Substances that are composed of the same elements in the same proportions and hence have the same molecular formula but differ in properties because of differences in the arrangement of atoms.
Compounds with the same molecular formula but different structural formulas.
Molecules that have the same empirical formula but differ in position of substituents or functional groups.
One of the two or more chemical substances having the same elementary percentage composition (i.e., same atoms) and molecular weight, but differing in structure and therefore in properties. There are many ways in which such structural differences (between the two or more isomeric molecules) occur. One example is η-butane [CH3(CH2)2CH3] and isobutane [CH3CH(CH3)2].
One or two or more compounds that are identical in chemical composition but differ in atomic structure.
One of two or more chemical substances that have the same molecular formula but different chemical and physical properties and different arrangements of the atoms in the molecule.
One of two or more chemical substances that have the same molecular formula but different chemical and physical properties owing to a different arrangement of the atoms in the molecule. Dextrose is an isomer of levulose.
A substance that has the same percentage composition as another but differs in the atomic arrangement within its molecules. As a result, the two substances exhibit different physical and chemical properties, even though they are fundamentally similar. An example includes red and yellow phosphorus.