Chemical substance - Wikipedia A chemical compound is a chemical substance that is composed of a particular set of atoms or ions Two or more elements combined into one substance through a chemical reaction form a chemical compound
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CHEMICAL Definition Meaning - Merriam-Webster The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry How to use chemical in a sentence
What Is A Chemical ? | NRC. gov A chemical reaction refers to a change in a chemical More generally, a chemical reaction can be understood as the process by which one or more substances change to produce one or more different substances