- Chemistry | Definition, Topics, Types, History, Facts | Britannica
Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization Today, vinyl, Teflon, liquid crystals, semiconductors, and superconductors represent the fruits of chemical technology
- Chemical reaction | Definition, Equations, Examples, Types - Britannica
Substances are either chemical elements or compounds A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
- Chemical compound | Definition, Examples, Types | Britannica
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
- 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 formula | Definition, Types, Examples, Facts | Britannica
Chemical formula, any of several kinds of expressions of the composition or structure of chemical compounds The forms commonly encountered are empirical, molecular, structural, and projection formulas
- Chemical synthesis | Organic Inorganic Reactions | Britannica
Chemical compounds are made up of atoms of different elements, joined together by chemical bonds A chemical synthesis usually involves the breaking of existing bonds and the formation of new ones
- 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
- Chemical energy | Definition Facts | Britannica
The chemical energy in food is converted by the body into mechanical energy and heat The chemical energy in coal is converted into electrical energy at a power plant
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