Apr 8, 2026 · 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 …

4 days ago · 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 …

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 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 …

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 …

Mar 1, 2026 · Sodium, chemical element of the alkali metal group in the periodic table.

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 …

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 …