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Chemistry | Definition, Topics, Types, History, Facts | Britannica 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 chemical identity
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 and Is Not a Chemical? - ThoughtCo A chemical is any substance consisting of matter This includes any liquid, solid, or gas A chemical is any pure substance (an element) or any mixture (a solution, compound, or gas) They can either occur naturally or can be created artificially
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
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
Chemical - Definition, Meaning Synonyms | Vocabulary. com A chemical is any mix of raw elements: hydrogen + oxygen produce the chemical water Water is created by a change in the chemistry of hydrogen and oxygen atoms — a chemical change