Chemical compound | Definition, Examples, Types | Britannica Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds
Chemistry | Definition, Topics, Types, History, Facts | Britannica Chemistry is the science of the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes Chemistry is concerned with the properties of atoms and the laws governing their combinations
Chemical reaction | Definition, Equations, Examples, Types - Britannica A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products Substances are either chemical elements or compounds A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
Chemical Banking Corporation | Merger, Acquisition, Rebranding . . . Chemical Banking Corporation, former American bank holding company that merged with The Chase Manhattan Corporation in 1996 The holding company’s principal subsidiary was Chemical Bank, which was chartered in 1824 in New York City as a division of the New York Chemical Manufacturing Company
Chemical element | Definition, Origins, Distribution, Facts | Britannica A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes Elements are the fundamental materials of which all matter is composed Learn more about the origins, distribution, and characteristics of chemical elements in this article
Chemical synthesis | Organic Inorganic Reactions | Britannica Chemical synthesis, the construction of complex chemical compounds from simpler ones It is the process by which many substances important to daily life are obtained It is applied to all types of chemical compounds, but most syntheses are of organic molecules Chemists synthesize chemical
Periodic table | Definition, Elements, Names, Symbols, Groups, Charges . . . Periodic table, in chemistry, is an organized array of all the chemical elements in order of increasing atomic number When the elements are thus arranged, there is a recurring pattern in which elements in the same column (group) have similar properties
Chlorine | Uses, Properties, Facts | Britannica Chlorine, chemical element of the halogen group that is a toxic, corrosive, greenish yellow gas, irritating to the eyes and respiratory system Much chlorine is used to sterilize water and wastes, and the substance is employed either directly or indirectly as a bleaching agent for paper