Chemistry (by profession)

Chemistry is one of the most important and broad branches of natural science, the science that studies substances, as well as their composition and structure, properties that depend on their composition and structure, and changes that lead to their change. This science includes chemical reactions, as well as the laws and rules governing these changes. Since all substances consist of atoms capable of forming molecules due to chemical bonds, chemistry is primarily a science dealing with the above tasks at the atomic and molecular level, that is, chemical elements and their levels.