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What Is a Chemical? Definition and Examples
A chemical is any substance with a definite composition and distinct properties. All matter is made of chemicals, regardless of whether it is natural or synthetic.
PubChem
Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.
Chemistry - Wikipedia
Chemical reactions usually involve the making or breaking of chemical bonds. Oxidation, reduction, dissociation, acid–base neutralization and molecular rearrangement are some examples of common chemical reactions.
West Coast chemical emergencies raise questions on regulating ...
There are millions of chemical tanks around the U.S., and experts say it is exceedingly rare for them to fail as long as they are properly maintained and inspected. Yet this past week, there were two major hazardous chemical emergencies on the West Coast.
Chemical leak at a West Virginia plant kills 2 people and ...
Authorities say a chemical leak at a West Virginia plant has killed two people and sent about 30 others to the hospital, including one person in serious condition.
Chemistry | Definition, Topics, Types, History, & Facts ...
Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, semiconductors, and superconductors represent the fruits of chemical technology.
Chemical element - Wikipedia
Almost all baryonic matter in the universe is composed of elements (among rare exceptions are neutron stars). The term "chemical element" is also widely used to mean a pure chemical substance consisting of a single element. For example, oxygen gas consists only of atoms of oxygen.
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