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Orichalcum or aurichalcum / ˌ ɔːr ɪ ˈ k æ l k ə m / is a metal mentioned in several ancient writings, including the story of Atlantis in the Critias of Plato.Within the dialogue, Critias (460–403 BC) says that orichalcum had been considered second only to gold in value and had been found and mined in many parts of Atlantis in ancient times, but that by Critias's own time, orichalcum ...
An element made up by Fender, who claims to be built out of said metal. Fender says it is yellow and tastes like chicken. Antidermis Bionicle: Greenish-black gas; forms the essence of the Makuta, the main villains of the series. They usually keep the antidermis inside suits of armor. Aquelium, terrelium, and plutulium The Goddess of Atvatabar
All group 11 elements are relatively inert, corrosion-resistant metals. Copper and gold are colored, but silver is not. Roentgenium is expected to be silvery, though it has not been produced in large enough amounts to confirm this. These elements have low electrical resistivity so they are used for wiring. Copper is the cheapest and most widely ...
Tumbaga is the name given by Spanish Conquistadors for a non-specific alloy of gold and copper, and metals composed of these elements. Pieces made of tumbaga were widely found in pre-Columbian Mesoamerica in North America and South America. The term is a borrowing from the Tagalog tumbaga. This came from Malay tembaga, meaning 'copper' or ...
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 .
Of the elements within the d-block with known electronegativities, zirconium has the fourth lowest electronegativity after hafnium, yttrium, and lutetium. [ 15 ] At room temperature zirconium exhibits a hexagonally close-packed crystal structure, α-Zr, which changes to β-Zr, a body-centered cubic crystal structure, at 863 °C.
A number of more exotic metals have been used to make demonstration or fantasy coins which have not been used to make monetized coins for a nation-state. Some of these elements would make excellent coins in theory (e.g. zirconium). More expensive metals that are intrinsically valuable as commodities are less practical as coinage due to their ...
The metallicity of an astronomical object is the proportion of its matter made up of the heavier chemical elements. [ 6 ] [ 7 ] The strength and resilience of some metals has led to their frequent use in, for example, high-rise building and bridge construction , as well as most vehicles, many home appliances , tools, pipes, and railroad tracks.