Chemical reactions can be summarised using symbol equations. Learn more in this KS3 Chemistry guide from Bitesize.
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Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds.
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A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. Learn more about the origins, distribution, and characteristics of chemical elements in this article.
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CHEMICAL definition: 1. any basic substance that is used in or produced by a reaction involving changes to atoms or…. Learn more.
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CHEMICAL meaning: 1. any basic substance that is used in or produced by a reaction involving changes to atoms or…. Learn more.
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The ancient Greeks thought that there were just four elements - earth, air, fire and water. However, we now know that there are actually 118 chemical elements. Everything on Earth and in the...
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Chemistry, 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.
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Chemists use symbols and formulae to represent elements, ions and compounds. Word equations and balanced chemical equations model the changes that happen in chemical reactions.
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Watch this video about how physical and chemical properties affect which materials we use in everyday life. While you're watching, try to look out for properties which are opposite to each other.
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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.
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An overview of the definitions of different types of chemicals, how chemicals can be represented in chemical equations, how chemicals can be separated, and a number of important calculations ...
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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.
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Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds.
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Understand what a chemical reaction is and learn through different examples of chemical reactions with this Bitesize Chemistry KS3 guide.
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1. any substance used in or resulting from a reaction involving changes to atoms or molecules, esp one derived artificially for practical use. adjective. 2. of or used in chemistry. chemical balance. 3. of, made from, or using chemicals. chemical fertilizer.
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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.
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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.
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The leading journal from the Royal Society of Chemistry for the publication of communications on important developments in the chemical sciences.
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The Chemical Engineering Journal focuses upon seven aspects of Chemical Engineering: Applied Biomaterials and Biotechnologies, Catalysis, Chemical Reaction Engineering, Computational Chemical Engineering, Environmental Chemical Engineering, Green …. View full aims & scope.
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