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What Is a Chemical? Definition and Examples 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 A chemical 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, they may form a chemical mixture [3]
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
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
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
Chemistry | Definition, Topics, Types, History, Facts . . . Most of the materials that occur on Earth, such as wood, coal, minerals, or air, are mixtures of many different and distinct chemical substances Each pure chemical substance (e g , oxygen, iron, or water) has a characteristic set of properties that gives it its