Gold is a good conductor of heat and electricity and does not tarnish when it is exposed to the air, so it can be used to make electrical connectors and printed circuit boards.
Gold is also a good reflector of infrared radiation and can be used to help shield spacecraft and skyscrapers from the sun's heat. Gold coated mirrors can be used to make telescopes that are sensitive to infrared light.
A radioactive isotope of gold, gold, is used for treating cancer. Gold sodium thiosulfate AuNa 3 O 6 S 4 is used as a treatment for arthritis. Chlorauric acid HAuCl 4 is used to preserve photographs by replacing the silver atoms present in an image. Number of Stable Isotopes : 1 View all isotope data. It is a very nonreactive transition metal in group 11, period 6, with 1 valence electron.
Silver and copper are also in group 11, although gold is not that similar to them chemically. It is one of the six precious metals. The gold atom has an electron configuration of [Xe] 4f 14 5d 10 6s 1. Until , the United States used the gold standard, in which gold backed the paper currency. In other words, the value of a dollar was based on an amount of gold, and gold could be exchanged for an amount of paper currency. Because of its malleability, relative ease of melting, and attractiveness, gold was extremely valuable and was a form of currency in ancient civilizations.
Compared to other elements, gold was relatively rare in nature, but there was still a substantial amount of it for it to back currencies. It is also non-toxic and fairly nonreactive, and thus would not tarnish or rust and would still be feasible to store. For these reasons, gold was a form of currency and backed paper currencies internationally.
In nature, it is usually chemically pure or in combination with tellurium, selenium , or bismuth. Gold only exists in the world in its gold isotope form. It is usually found in and mined from quartz veins or placer deposits. Gold mining is extremely destructive to the environment. Processes such as open-pit mining strip away at the land, leaving toxic wastes that are harmful to humans, plants, and animals.
Toxic elements such as mercury and cyanide are byproducts of gold mining. Mining companies dump the toxic wastes into natural water bodies, where they contaminate the water and have even more adverse effects on the environment. The element gold is a very dense, malleable, conductive, ductile, and attractive metal. Because of these properties, many ancient decorations, art pieces, and currencies contained gold.
In jewelry, it forms alloys with other metals to make the jewelry harder and thus more durable. How does gold get its name? How is gold mined? How many grams in an ounce of gold? How much gold is found in the human body? How much gold is there in an Olympic gold medal?
How much gold is gold worth? What family does the element gold belong to? What gold detectors actually work finding gold? What happened during the Klondike gold rush? What is gold used for?
What is the boiling point of gold? What is the Latin word for gold? Gold minerals form in hot rocks in and around volcanoes. Low sulfur, gold -bearing hydrothermal fluids form when hot rocks heat ground water.
Lead is a bluish-white lustrous metal. It is very soft, highly malleable, ductile, and a relatively poor conductor of electricity. It is very resistant to corrosion but tarnishes upon exposure to air. Lead isotopes are the end products of each of the three series of naturally occurring radioactive elements.
Gold conducts heat and electricity. Copper and silver are the best conductors , but gold connections outlast both of them because they do not tarnish. It is not that the gold lasts longer, but that it remains conductive for a longer time. Gold is ductile: It can be drawn out into the thinnest wire.
When was the element gold discovered? Category: science chemistry. Discovery date approx BC Discovered by - Origin of the name The name is the Anglo-Saxon word for the metal and the symbol comes from the Latin 'aurum', gold. Is Salt an element? Chemically Speaking.
Why is gold so valuable to humans? Is Gold native to Earth? How does gold grow?
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