- Chemical Definition Meaning | Britannica Dictionary
CHEMICAL meaning: 1 : of or relating to chemistry; 2 : working by means of chemicals
- 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 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 compound | Definition, Examples, Types | Britannica
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
- 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)
- 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
- What is the basic formula for photosynthesis? | Britannica
The process of photosynthesis is commonly written as: 6CO 2 + 6H 2 O → C 6 H 12 O 6 + 6O 2 This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products The sugar is used by the organism, and the oxygen is released as a by-product
- Chemical castration | Usage, Treatment, Legality, Facts | Britannica
Chemical castration is the use of drugs to suppress the production of sex hormones It differs from surgical castration in that it is reversible and its effects typically stop when the drugs are ceased
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