#GOLD ELEMENT FREE#
#GOLD ELEMENT WINDOWS#

Gold has not been evaluated for its ecotoxicity. It is prescribed when treatment with non-steroid antu-infiammatory drugs is failing to give relief. Gold is used to cure rheumatoid arthritis, under a treatment called Chrysoteraphy. Skin: May cause irritation and allergic reaction. Health effects of goldĮffects of exposure: Inhalation: May cause irritation if exposure is prolonged or excessive. World production is around 2500 tonnes per year, but reserves are estimated to be ten of thousand of tonnes. Gold is found in sea water, but no effective economic process has been designed (yet) to extract it from this source. Other main mining areas are Canada and Russia. Two thirds of the world's supply comes from South Africa, and 2/ 3 of USA production is from South Dakota and Nevada. Most gold is mined and comes from gravels and quarts veins or is associated with pyrites deposits.

#GOLD ELEMENT FREE#

It is found free in nature and associated with quartz, pyrite and other minerals. Its interness and its high density causes it to concentrate in streambeds, either in small flakes or in larger nuggets, from which it may be recovered by panning. Gold is widely distributes on the earth at a background level of 0.03 g/1000 kg (0.03 ppm by weight). Gold electroplating is used to in the electronic industry to protect their copper components and improve their solderability.

#GOLD ELEMENT WINDOWS#

Colloidal gold is added to glass to colour it red or purple, and metallic gold is applied as a thin film on the windows of large building to reflect the heat of the Sun's ray. Gold for jewellery can be given a range of hues depending on the metal with which is alloyed (white, red, blue, green etc.). Jewellery consumes around 75% of all gold produced. Gold is used as buillon and in jewellery, glass and electronics. It is unaffected by air and most reagents. A mixture of one part nitric acid with three of hydrochloric acid is called aqua regia (because it dissolved gold, the King of Metals). The most common gold compounds are auric chloride (AuCl 3) and chlorauric acid (HAuCl 4). It is estimated that all the gold in the world, so far refined, could be placed in a single cube 60 ft. Gold is usually alloyed in jewellery to give it more strength, and the term carat describes the amount of gold present (24 carats is pure gold). It is a good conductor of heat and electricity, and is unaffected by air and most reagents. It is a soft metal and is usually alloyed to give it more strength. It is the most malleable and ductile metal 1 ounce (28 g) of gold can be beaten out to 300 square feet. Gold is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple.

Gold - Au Chemical properties of gold - Health effects of gold - Environmental effects of gold

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