👉 The term "chalcographic" is a name given to a type of mathematical notation used in the field of chemistry and physics. Chalcography, or chalcograms, is a system that represents chemical compounds by their structure as a series of molecules, each with a unique formula, such as CH4 (methane), CO2 (carbon dioxide), or HCl (hydrochloric acid). The chalcographic notation uses the letters "CH" for carbon and "O" for oxygen