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Gold is used as the reflective layer on some high-end CDs. Automobiles may use gold for heat shielding. McLaren uses gold foil in the engine compartment of its F1 model. [211] Gold can be manufactured so thin that it appears semi-transparent. It is used in some aircraft cockpit windows for de-icing or anti-icing by passing electricity through ...
The name is mostly applied informally to compositions between 20–80% gold and 80–20% silver, but these are strictly called gold or silver depending on the dominant element. Analysis of the composition of electrum in ancient Greek coinage dating from about 600 BC shows that the gold content was about 55.5% in the coinage issued by Phocaea.
Selenium, which is an essential element for animals and prokaryotes and is a beneficial element for many plants, is the least-common of all the elements essential to life. [ 3 ] [ 63 ] Selenium acts as the catalytic center of several antioxidant enzymes, such as glutathione peroxidase , [ 11 ] and plays a wide variety of other biological roles .
[n 19] Of the two dozen elements that have been used in the world's monetised coinage only two, carbon and aluminium, are not heavy metals. [167] [n 20] Gold, silver, and platinum are used in jewellery [n 21] as are, for example, nickel, copper, indium, and cobalt in coloured gold. [170]
Gold compounds are compounds by the element gold (Au). Although gold is the most noble of the noble metals , [ 1 ] [ 2 ] it still forms many diverse compounds. The oxidation state of gold in its compounds ranges from −1 to +5, but Au(I) and Au(III) dominate its chemistry.
Ivory is a hard, white material from the tusks (traditionally from elephants) and teeth of animals, that consists mainly of dentine, one of the physical structures of teeth and tusks. The chemical structure of the teeth and tusks of mammals is the same, regardless of the species of origin, but ivory contains structures of mineralised collagen. [1]
Best gold – a suspension of gold powder in essential oils mixed with a flux and a mercury salt extended. This can be applied by a painting technique. From the kiln, the decoration is dull and requires burnishing to reveal the full colour; Acid Gold – a form of gold decoration developed in the early 1860s at the English factory of Mintons Ltd.
Pages in category "Gold compounds" The following 13 pages are in this category, out of 13 total. This list may not reflect recent changes. ...