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 …
Substance (chemistry) - Wikipedia
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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 …
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， …
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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.
Chemical reaction | Definition, Equations, Examples, & Types - Britannica
Jul 27, 2026 · Chemical reactions differ from physical changes, which include changes of state, such as icemelting to waterand water …
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
Jul 31, 2026 · The rate at which chemical knowledge continues to accumulate is remarkable. Over time more than 8,000,000 …