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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 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 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 The chemical energy in a battery can also supply electrical power by means of electrolysis
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
Oxalic acid | Formula, Uses, Facts | Britannica The chief chemical characteristic of the carboxylic acids is their acidity They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e g , hydrochloric acid, HCl, sulfuric acid, H 2 SO 4, etc )
Chemical weapon - Banning, Prohibition, Conventions | Britannica Chemical weapon - Banning, Prohibition, Conventions: During World War I, Germany, France, the United Kingdom, and Russia developed a wide array of chemical arms, including choking, blister, blood, and irritant agents