The notations that represent chemical elements are known as chemical symbols. Using a symbol made up of two letters instead of complete names to refer to elements in chemistry simplifies things. It's a short-hand method based on how we use short names in our everyday lives to depict better chemical processes in science pictures.
A chemical reaction is represented by a chemical equation. Because a chemical equation only employs element symbols and noteworthy signs to express the reaction, you can't show a full presentation with molecular geometry using a chemical equation. There are also the symbols that are utilized in chemical equations.