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Interactive Periodic Table of the Elements | Symbols, Atomic Weights ...
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 weapon | Convention, Definition, List, World War I, World War ...
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).
Bhopal disaster | Causes, Effects, Facts, & History | Britannica
What was the Bhopal disaster? The Bhopal disaster was a chemical leak that occurred on December 3, 1984, in the Indian city of Bhopal. It killed an estimated 15,000 to 20,000 people. At the time, it was the worst industrial accident in history.
Love Canal | History, Environmental Disaster, Toxic Waste, & Health ...
Love Canal is a neighborhood in Niagara Falls, New York, U.S., that was the site of the worst environmental disaster involving chemical wastes in U.S. history. After discovery of the pollution in the 1970s, the neighborhood was cleared of its houses and residents and cleaned up over many years.
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 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.
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
The identification of pure substances and the analysis of chemical mixtures enable all other chemical disciplines to flourish. The importance of analytical chemistry has never been greater than it is today.
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 formula | Definition, Types, Examples, & Facts | Britannica
Chemical formula, any of several kinds of expressions of the composition or structure of chemical compounds. The forms commonly encountered are empirical, molecular, structural, and projection formulas.
Chemical industry | Overview, Importance, & History | Britannica
Chemical industry, complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Raw materials include fossil fuels and inorganic chemicals.
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