- Chemistry | Definition, Topics, Types, History, Facts | Britannica
Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization Today, vinyl, Teflon, liquid crystals, semiconductors, and superconductors represent the fruits of chemical technology
- Chemical compound | Definition, Examples, Types | Britannica
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
- Chemical element | Definition, Origins, Distribution, Facts | Britannica
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
- Chemical reaction | Definition, Equations, Examples, Types - Britannica
A chemical reaction is 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
- Chemical Definition Meaning | Britannica Dictionary
CHEMICAL meaning: 1 : of or relating to chemistry; 2 : working by means of chemicals
- Chemical energy | Definition Facts | Britannica
The chemical energy in food is converted by the body into mechanical energy and heat The chemical energy in coal is converted into electrical energy at a power plant The chemical energy in a battery can also supply electrical power by means of electrolysis
- Chemical weapon | History, Facts, Types, Effects | Britannica
Chemical weapon, any of several chemical compounds, usually toxic agents, that are intended to kill, injure, or incapacitate In modern warfare, chemical weapons were first used in World War I (1914–18)
- Periodic table | Definition, Elements, Groups, Charges, Trends, Facts . . .
Periodic table, in chemistry, the organized array of all the chemical elements in order of increasing atomic number When the elements are thus arranged, there is a recurring pattern called the ‘periodic law’ in their properties, in which elements in the same column (group) have similar properties
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