Separating the Components of a Mixture Dialysis Chromatography Electrophoresis Pure Substances Mixtures and Compounds Mixtures are heterogeneous forms of matter. Mixtures are composed of variable proportions of molecules and atoms.
Compounds are homogeneous forms of matter.
The composition of a mixture is variable. Each of its components retains its characteristic properties. Its components are easily separated. The relative proportions of the elements in a compound are fixed. The components of a compound do not retain their individual properties.