|
PubChem
Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.
What Is a Chemical? Definition and Examples - Science Notes and Projects
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.
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
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.
Substance (chemistry) - Wikipedia
In chemistry, substance is a unique form of matter with constant chemical composition and characteristic properties. [1][2] Chemical substances may take the form of a single element or chemical compounds.
CHEMICAL Definition & Meaning | Dictionary.com
CHEMICAL definition: a substance produced by or used in a chemical process. See examples of chemical used in a sentence.
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.
What is a Chemical ? | Nuclear Regulatory Commission - NRC
Chemical changes are different from physical changes, which don't result in a change in substances. One example of a physical change is when water freezes into ice.
Chemical - definition of chemical by The Free Dictionary
Relating to or produced by means of chemistry: a chemical discovery; a chemical change.
C&EN | Chemistry news from around the world
Chemical & Engineering News is a weekly news magazine published by the American Chemical Society, providing professional and technical news and analysis in the fields of chemistry and chemical ...
CHEMICAL definition and meaning | Collins English Dictionary
Chemical means involving or resulting from a reaction between two or more substances, or relating to the substances that something consists of. ...chemical reactions that cause ozone destruction. ...the chemical composition of the ocean. ...chemical weapons.
|
FIRE101 Fire Jobs 