plural chemicals Britannica Dictionary definition of CHEMICAL [count] : a substance (such as an element or compound) that is made by a chemical process

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. …

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 …

Feb 20, 2026 · chemical engineering, the development of processes and the design and operation of plants in which materials undergo changes in their physical or chemical state. Applied throughout the …

Chemical Products Although nature provides us with a staggering amount of natural resources, humankind has also made use of a great variety of man-made compounds and substances. The …

Mar 13, 2026 · Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other species. When atoms approach one another, their electrons …

Chemical industry, complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Raw materials include fossil fuels and inorganic chemicals. An …

4 days ago · Chemical Banking Corporation, former American bank holding company that merged with The Chase Manhattan Corporation in 1996. The holding company’s principal subsidiary was …

Mar 31, 2026 · Urea, the diamide of carbonic acid. It has important uses as a fertilizer and feed supplement, as well as a starting material for the manufacture of plastics and drugs. It is a colorless, …

An organic compound is any chemical compound in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. The few carbon …