Lewis-Langmuir theories, which discuss the behavior of ions and electrons at the surface of a solid, have a variety of synonyms. These include adsorptive theory, surface chemistry theory, and surface science theory. In addition to these more general terms, there are also specific branches of the Lewis-Langmuir theories that have their unique jargon. For example, the theory of adsorption is often referred to as the Fritz-Haber equation. The BET theory, which discusses the relationship between surface area and gas adsorption, is another well-known aspect of Lewis-Langmuir theories. Overall, these theories play a crucial role in our understanding of chemical reactions and the workings of various materials.