👉 Impingement, in the context of chemistry and physics, is a phenomenon where two molecules or substances are brought into close proximity to each other, causing them to stick together. This interaction can occur when one molecule has gaps or holes that allow electrons to move freely through the material, while the other molecule does not have these gaps. In this situation, the impingement occurs because of the presence of a "gap" between the two molecules, which allows for the transfer of electrons and ions,