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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 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 energy | Definition Facts | Britannica Chemical reactions differ from physical changes, which include changes of state, such as ice melting to water and water evaporating to vapor If a physical change occurs, the physical properties of a substance will change, but its chemical identity will remain the same
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
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 bonding - Covalent, Molecules, Atoms | Britannica Chemical bonding - Covalent, Molecules, Atoms: When none of the elements in a compound is a metal, no atoms in the compound have an ionization energy low enough for electron loss to be likely In such a case, covalence prevails