What Is a Chemical? Definition and Examples - Science Notes and …
Oct 15, 2023 · A chemical is any substance with a definite composition and distinct properties. All matter is made of chemicals, …
PubChem
Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular …
Chemistry - Wikipedia
Chemical reactions usually involve the making or breaking of chemical bonds. Oxidation, reduction, dissociation, acid–base …
CHEMICAL Definition & Meaning - Merriam-Webster
4 days ago · The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry. How to …
ChemicalBook
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CHEMICAL | English meaning - Cambridge Dictionary
CHEMICAL definition: 1. any basic substance that is used in or produced by a reaction involving changes to atoms or…. Learn more.
ChemicalBook
ChemicalBook是一家致力于为化学行业用户提供最有价值信息的资源平台，在这里可以使用中文名称，CAS号，英文名称，分子式， …
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
Jul 31, 2026 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of …
Chemical reaction - Wikipedia
Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have …
Chemical reaction | Definition, Equations, Examples, & Types - Britannica
Jul 27, 2026 · Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the …