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Bookmark or Share- Iron | Element, Occurrence, Uses, Properties, & Compounds | BritannicaIron (Fe), chemical element and one of the transition elements, the most-used and cheapest metal. Iron makes up 5 percent of Earth’s crust and is second in abundance to aluminum among the metals. Iron, which is the chief constituent of Earth’s core, is the most abundant element in Earth as a whole.
- Salt | Chemistry, History, Occurrence, Manufacture, Uses, & Facts ...Salt, also called sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. The mineral form halite, or rock salt, is sometimes called common salt to distinguish it from a class of chemical compounds called salts. Learn more about salt in this article.
- Chemical element | Definition, Origins, Distribution, & Facts | BritannicaA 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.
- Carbon monoxide | Chemical, Poisoning, Properties, Reactions, Pollution ...Carbon monoxide is a highly toxic, colorless, odorless, flammable gas. It is produced industrially for use in the manufacture of numerous organic and inorganic chemical products. It is also present in the exhaust gases of internal-combustion engines and furnaces, and is a major air pollutant.
- Gold | Facts, Properties, & Uses | BritannicaGold, a dense lustrous yellow precious metal and a chemical element of Group 11. Gold is attractive in color and brightness, durable to the point of virtual indestructibility, highly malleable, and usually found in nature in a comparatively pure form.
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