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Chemical substance - Wikipedia
https://en.wikipedia.org/wiki/Chemical_substance
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 … See more
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Chemistry - Wikipedia
https://en.wikipedia.org/wiki/Chemistry
OverviewModern principlesEtymologyHistoryPracticeSee alsoBibliographyFurther readingThe current model of atomic structure is the quantum mechanical model. Traditional chemistry starts with the study of elementary particles, atoms, molecules, substances, metals, crystals and other aggregates of matter. Matter can be studied in solid, liquid, gas and plasma states, in isolation or in combination. The interactions, reactions and transformations that are studied i…
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What Is a Chemical? Definition and Examples - Science Notes …
https://sciencenotes.org/what-is-a-chemical-definition-and-examples/
Web ResultOct 15, 2023 · A chemical is a substance with a specific composition, such as water, sugar, or gold. It can be natural or synthetic, pure or mixed, and it has physical …
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Chemical reaction | Definition, Equations, Examples, …
https://www.britannica.com/science/chemical-reaction
Web Result3 days ago · Learn what a chemical reaction is, how it differs from a physical change, and how to write and interpret chemical equations. Explore the history, basic concepts, and applications of chemical …
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Chemical compound | Definition, Examples, & Types | Britannica
https://www.britannica.com/science/chemical-compound
Web ResultMar 11, 2024 · Learn what a chemical compound is, how it is formed from atoms of different elements, and how it can be classified as molecular, ionic, organic, or …
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Chemical Definition & Meaning - Merriam-Webster
https://www.merriam-webster.com/dictionary/chemical
Web ResultLearn the meaning of chemical as an adjective and a noun, with examples of usage and word history. Find out how to cite, translate, and explore related words and …
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CHEMICAL | English meaning - Cambridge Dictionary
https://dictionary.cambridge.org/dictionary/english/chemical
Web ResultLearn the meaning of chemical as a noun, adjective and adverb, and see how it is used in different contexts. Find out the synonyms, collocations and translations of …
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Chemical element | Definition, Origins, Distribution,
https://www.britannica.com/science/chemical-element
Web ResultFeb 16, 2024 · Learn about the origin, distribution, and properties of the 118 known chemical elements, the fundamental substances of which all matter is composed. Explore the historical development …
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CHEMICAL | definition in the Cambridge English Dictionary
https://dictionary.cambridge.org/us/dictionary/english/chemical
Web ResultLearn the meaning of chemical as a noun, adjective and adverb in English, with examples of usage and collocations. Find out how to pronounce chemical and …
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PubChem
https://pubchem.ncbi.nlm.nih.gov/
Web ResultPubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and …
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