Is defined as the movement

On the surface of the particles are Van der Waals forces and even be interatomic bonds that can attract and hold unsatisfied atoms, ions, molecules or substances. This adherence of foreign substances on the surface of a particle is called adsorption. The adsorbed substances are held firmly together in layers typically have no more than one or two molecules (or ions) thick. Although millipore centrifugal filter units adsorption is a general phenomenon in solid, is particularly efficient in colloidal dispersions, due to the enormous amount of surface area.
Is that a light beam is visible

as it passes through a colloidal system. This phenomenon millipore centrifugal filter units is due to the colloidal particles scatter light in all directions, making it visible. The light beams can be seen passing through millipore centrifugal filter units a wood, for example, as a result of light scattering by the colloidal particles suspended in the air of the forest.
Have you ever observed or dust particles moving randomly dancing in a shaft of sunlight entering through a window (or open shade), or dust and smoke particles moving randomly in a beam of light from the booth projection of a movie theater? Well, these phenomena are examples of Brownian motion.
The disordered movement of said colloidal particles is due to bombardment or collision with the molecules of the dispersing medium, and in the examples millipore centrifugal filter units above would by molecules present in the air (N2, O2, Ar, Cr2, etc.).
The movement is called Brownian motion in memory of English botanist Robert Brown, who first observed the irregular motion millipore centrifugal filter units of particles in 1827, while studying the behavior of microscopic pollen grains suspended in water. Brownian motion prevents the colloidal particles settle or sediment.
Involves the migration of charged colloidal particles in an electric field. millipore centrifugal filter units As noted early, the colloidal particles adsorbed ions on the surface charging positively or negatively, though the whole is electrically neutral millipore centrifugal filter units colloidal system, these particles travel to the electrodes (cathode millipore centrifugal filter units and anode) by electrical forces of attraction.
Is defined as the movement

of ions and small molecules through a porous membrane or dialysis membrane dialyzing call, but not large molecules or colloidal particles. Dialysis is not an exclusive property of colloids, since some solutions may also be dialyzed, for example, biochemical dialysis commonly used to separate millipore centrifugal filter units protein molecules aqueous ion.
In colloids,

dialysis allows purify the colloidal system, since ions are eliminated and other small molecules considered impurities. Dialytic membranes are used as the cellophane membranes and animal origin.
Density Density, Pressure and Temperature Gaseous State Chemical Bonding States of Matter Atomic Structure Matter introductory chemistry atomic models Equivalent Weight Nomenclature Inorganic Chemistry millipore centrifugal filter units Organic Chemistry Molecular Systems Symmetry chemical reactions

Dispersed Periodic Table Chemical Mass Temperature Units