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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 Definition & Meaning | Britannica Dictionary
plural chemicals Britannica Dictionary definition of CHEMICAL [count] : a substance (such as an element or compound) that is made by a chemical process
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.
Salt | Chemistry, History, Occurrence, Manufacture, Uses, & Facts ...
Salt, also called sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. The mineral form halite, or rock salt, is sometimes called common salt to distinguish it from a class of chemical compounds called salts. Learn more about salt in this article.
Chemistry - Analysis, Reactions, Compounds | Britannica
Chemistry - Analysis, Reactions, Compounds: Most of the materials that occur on Earth, such as wood, coal, minerals, or air, are mixtures of many different and distinct chemical substances. Each pure chemical substance (e.g., oxygen, iron, or water) has a characteristic set of properties that gives it its chemical identity. Iron, for example, is a common silver-white metal that melts at 1,535 ...
Gold | Facts, Properties, & Uses | Britannica
Gold, a dense lustrous yellow precious metal and a chemical element of Group 11. Gold is attractive in color and brightness, durable to the point of virtual indestructibility, highly malleable, and usually found in nature in a comparatively pure form.
Alcohol | Definition, Structure, Classification, Commercial Uses ...
An alcohol is an organic compound with one or more hydroxyl groups attached to a carbon atom of an alkyl group. Alcohols may be considered as organic derivatives of water, in which a hydrogen atom has been replaced by an alkyl group. Examples include ethanol, methanol, and isopropyl alcohol.
Chemical engineering | Processes, Principles & Applications | Britannica
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 process industries, it is founded on the principles of chemistry, physics, and mathematics. The laws of physical chemistry and physics govern the practicability and efficiency of chemical engineering operations ...
Chemical industry | Overview, Importance, & History | Britannica
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 average chemical product is passed from factory to factory several times before it emerges into the market.
Photosynthesis | Definition, Formula, Process, Diagram, Reactants ...
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
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