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Chemical substance - Wikipedia Chemical substances can exist in several different physical states or phases (e g solids, liquids, gases, or plasma) without changing their chemical composition Substances transition between these phases of matter in response to changes in temperature or pressure
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 While ice may have different physical properties, it is still just water Another example is when you dissolve salt into a cup of water
What Is a Chemical? Definition and Examples For example, pesticides in water or artificial colorings in food are “chemicals ” But, chemistry sees chemicals somewhat differently A chemical is a substance with a specific composition It is an element, an alloy, or a compound made up of two or more elements combined in a fixed ratio
PubChem 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
Chemistry | Definition, Topics, Types, History, Facts | Britannica Chemistry is the study of substances—that is, elements and compounds —while biology is the study of living things However, these two branches of science meet in the discipline of biochemistry, which studies the substances in living things and how they change within an organism
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 | English meaning - Cambridge Dictionary Many chemicals have a damaging effect on the environment The chemical industry produces such things as petrochemicals, drugs, and rubber Sodium chloride is the chemical name for common salt All chemical weapons facilities will be deactivated
CHEMICAL Definition Meaning - Merriam-Webster The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry How to use chemical in a sentence