chemicals wikipedia - EAS
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See all on Wikipediahttps://en.wikipedia.org/wiki/Chemical_substanceA chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can … See more
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. All compounds are substances, but not … See more
• Bulk chemicals are produced in very large quantities, usually with highly optimized continuous processes and to a relatively low price.
• Fine chemicals are produced at a high cost in small … See moreThe concept of a "chemical substance" became firmly established in the late eighteenth century after work by the chemist Joseph Proust on the composition of some pure … See more
All matter consists of various elements and chemical compounds, but these are often intimately mixed together. Mixtures contain more than one chemical substance, and they do not have a … See more
Every chemical substance has one or more systematic names, usually named according to the IUPAC rules for naming. An alternative system is used by the Chemical Abstracts Service (CAS).
Many compounds are also known by their more common, … See moreWikipedia text under CC-BY-SA license- https://en.wikipedia.org/wiki/Chemistry
The 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 in …
Wikipedia · Text under CC-BY-SA license - https://en.wikipedia.org/wiki/Chemical_industry
- The chemical industry comprises the companies that produce industrial chemicals. Central to the modern world economy, it converts raw materials into more than 70,000 different products. The plastics industry contains some overlap, as some chemical companies produce plastics as well as chemicals. Various professionals are involved in the chemical in...
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- https://en.wikipedia.org/wiki/Chemical_element
Web122 rows · Most of the remaining naturally occurring chemical elements …
See all 122 rows on en.wikipedia.orgELEMENT ELEMENT ELEMENT ORIGIN OF NAME [41] [42] 1 H Hydrogen Greek elements hydro- and -gen, ' water ... 2 He Helium Greek hḗlios, ' sun ' 3 Li Lithium Greek líthos, ' stone ' 4 Be Beryllium Beryl, a mineral (ultimately from the ...
- https://simple.wikipedia.org/wiki/ChemistrySee more on simple.wikipedia.orgBefore 1600, people studied substances to figure out how to do things such as turn lead into gold, but no one managed to do that. This was called alchemy. After 1600, using the scientific method alchemists became chemists. Chemists separated the air into many parts and isolated the noble gases from it. They also processed …
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- https://simple.wikipedia.org/wiki/Chemical_substance
WebA chemical substance is any material with a known chemical composition. For example, …
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