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1. Chemical substance - Wikipedia
Link: https://en.wikipedia.org/wiki/Chemical_substance
Description: A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture. If a mixture is separated to isolate one c… See more
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2. What Is a Chemical? Definition and Examples - Science …
Link: https://sciencenotes.org/what-is-a-chemical-definition-and-examples/
Description: WebOct 15, 2023 · Learn what a chemical is and how to identify it based on its composition, properties, and reactions. Explore the role of chemicals in medicine, food, environment, and more.
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3. Chemistry - Wikipedia
Link: https://en.wikipedia.org/wiki/Chemistry
Description: OverviewHistoryEtymologyModern principlesPracticeSee alsoBibliographyFurther readingThe history of chemistry spans a period from the ancient past to the present. Since several millennia BC, civilizations were using technologies that would eventually form the basis of the various branches of chemistry. Examples include extracting metals from ores, making pottery and glazes, fermenting beer and wine, extracting chemicals from plants for medicine and perfume, renderi…
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4. Chemical compound | Definition, Examples, & Types
Link: https://www.britannica.com/science/chemical-compound
Description: WebMar 11, 2024 · Learn about chemical compounds, substances composed of identical molecules of two or more elements. Find out how they are classified, formed, and changed by chemical reactions.
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5. PubChem
Link: https://pubchem.ncbi.nlm.nih.gov/
Description: WebPubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological …
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6. What is a Chemical ? | NRC.gov
Link: https://www.nrc.gov/reading-rm/basic-ref/students/science-101/what-is-a-chemical.html
Description: WebMar 19, 2020 · A chemical is any substance that has a defined composition, such as iron and oxygen in iron oxide. Learn how to distinguish between chemical and physical changes, and see how a chemical reaction can …
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7. What Is and Is Not a Chemical? - ThoughtCo
Link: https://www.thoughtco.com/what-is-a-chemical-604316
Description: WebDec 7, 2019 · A chemical is any substance consisting of matter, such as a liquid, solid, or gas. A chemical can be natural or artificial, and it can be made up of elements or molecules. Learn the examples of naturally …
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8. Molecules, salts, compounds, and chemicals (article)
Link: https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-bonding/x2613d8165d88df5e:covalent-bonds/a/molecules-salts-compounds-and-chemicals-what-s-the-difference
Description: WebLearn how to describe different chemical substances based on their composition and bonding. Find out the definitions and examples of molecules, salts, compounds, and chemicals, and how to distinguish them from each other.
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9. Chemical Definition - Chemistry Glossary - ThoughtCo
Link: https://www.thoughtco.com/definition-of-chemical-604406
Description: WebMay 8, 2019 · Learn the meaning of the word "chemical" as an adjective and a noun in chemistry and common usage. Find examples of chemicals and non-chemicals, and how to distinguish them.