I am a highschooler learning about adsorption for the first time.My school textbook says--
"The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed adsoption"(Definition 1)
and i started thinking What does molecular species mean? So i checked out Wikipedia-
Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface.(Defiinition 2)
So does the word molecular species in definition 1 refer to atoms,ions and molecules.(Definition 2)?
Also definition 1 mentions that this phenomenon takes place on the surface of a solid or liquid why does it not mention gases?