- What Is a Chemical? Definition and Examples - Science Notes and Projects
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 For instance, water (H 2 O) is a chemical because it consists of hydrogen and oxygen combined in a 2:1 ratio
- 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
- PubChem
Search and explore chemical information in the world's largest free chemistry database 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
- What Is a Chemical and What Isnt 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
CHEMICAL definition: 1 any basic substance that is used in or produced by a reaction involving changes to atoms or… Learn more
- CHEMICAL Definition Meaning - Merriam-Webster
: a substance (as an element or compound) obtained from a chemical process or used to get a chemical result
- Chemistry | Definition, Topics, Types, History, Facts | Britannica
chemistry, the science that deals with 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
- What is a Chemical - NRC
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
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