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    A chemical substance, also known as a pure substance, is a form of matter that consists of molecules of the same composition and structure. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds.

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  • Chemical CommunicationsThe Royal Society of Chemistry

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  • How gold is madehistory, used, parts, procedure

    5 If the gold is still not pure enough, it can be smelted. Smelting involves heating the gold with a chemical substance called flux. The flux bonds with the contaminants and floats on top of the melted gold.

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  • chemical elementDefinition, Origins, Distribution

    Chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. The important difference between a mixture and a chemical compound eventually was understood

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    Get the latest international news and world events from Asia, Europe, the Middle East, and more. See world news photos and videos at ABCNews

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  • SolubilityWikipedia

    Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and presence of other chemicals

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  • Astatinechemical elementBritannica

    Astatine: Astatine (At), radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (VIIa) of the periodic table. Astatine, which has no stable isotopes, was first synthetically produced (1940) at the University of California by American physicists Dale R. Corson, Kenneth R.

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    What you need is what we can do! In the future, Xinhai will continue to rely on three big supporting "technology, talents, management", adhere to the international development strategy, and concentrate on providing customers with modern, efficient, energy-saving mine overall construction and operational solution, to create international leading enterprises in mining industry.