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PubChem
PubChem 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 activities, safety and toxicity information, patents, literature citations and more.
Substance (chemistry) - Wikipedia
Steam and liquid water are two different forms of the same pure chemical substance, water. Picture of a formed molecule 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. If two or more chemical substances can be combined without reacting ...
What Is a Chemical? Definition and Examples - Science Notes and Projects
A chemical is matter with a defined composition. What is a chemical? In science, a chemical is any substance with a specific composition, whether it’s a single element or a compound of multiple elements. While people often think of “chemicals” as synthetic or harmful substances, the truth is that everything around you, including water, air, and even your own body, consists of chemicals ...
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
Chemistry is the science of the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes. Chemistry is concerned with the properties of atoms and the laws governing their combinations.
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.
What is a Chemical ? | Nuclear Regulatory Commission - NRC
The Nuclear Regulatory Commission's Science 101: What is a Chemical? A chemical is any substance that has a defined composition. In other words, a chemical is always made up of the same "stuff." Some chemicals occur in nature, such as water. Other chemicals are manufactured, such as chlorine (used for bleaching fabrics or in swimming pools).
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.
Chemical - definition of chemical by The Free Dictionary
Define chemical. chemical synonyms, chemical pronunciation, chemical translation, English dictionary definition of chemical. adj. 1. Of or relating to chemistry. 2. Of or relating to the properties or actions of chemicals. 3. Of or relating to chemical weapons: chemical warfare....
What Is and Is Not a Chemical? - ThoughtCo
A chemical is any substance that is made of matter, like solids, liquids, or gases. Light, heat, and sound are not chemicals since they are not made of matter. Chemicals can be both natural, like oxygen, or artificial, like stainless steel.
Chemical Definition & Meaning | YourDictionary
Chemical definition: Of or relating to the properties or actions of chemicals.
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