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Elements and Chemicals 

Elements and Chemicals

Roxanne K. Young

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date: 21 January 2020

In general, the names of chemical elements and compounds should be expanded in the text at first mention and elsewhere in accordance with the guidelines for clinical and technical terms. (See also , Nomenclature, Drugs, Chemical Names; and , Nomenclature, Isotopes.) However, in some circumstances it may be helpful or necessary to provide the chemical symbols or formulas in addition to the expansion if the compound under discussion is new or relatively unknown or if no nonproprietary term exists. For example: 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD, or dioxin) is often referred to as the most toxic synthetic chemical known. [Use TCDD or dioxin

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