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(adhesion to a surface)

Adsorption is the adhesion of the atoms or molecules of a substance to a surface. The substance can be gas, liquid, or dissolved solid. Two classes are:

  • Physisorption - Adsorption not involving chemical bonding or reconfiguration, generally caused by a Van Der Waals Force, which is a type of weak force between molecules, that can draw them together without reconfiguring them into different molecules.
  • Chemisorption - Adsorption that does involve a chemical reaction between the components, i.e., formation of new molecules through Covalent or Ionic Bonds, i.e., sharing or transferring electrons.


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