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Tungsten rods with evaporated crystals, partially oxidized with colorful tarnish, as well as a 1 cm 3 tungsten cube for comparison. Tungsten is a hard, rare metal under standard conditions when uncombined and is found naturally on Earth only in chemical compounds. Its chemical symbol is W, which represents its alternative name, "wolfram".
Another catalytic use of tungsten is as a De-NO X catalyst which is used in the treatment of nitrogen oxide emissions to convert harmful nitrogen oxides into inert N 2 gas. [14] Another modern day use of tungsten is as a lubricant. Tungsten disulfide (WS 2) is a lubricant with a dynamic coefficient of friction of ~0.03. Tungsten disulfide can ...
Download QR code; Print/export Download as PDF; ... This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of ...
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118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).