Gold is a very precious metal chemical element that has the symbol Au and atomic number 79 in the periodic table. The so-called natural consignment before hitting by donation. Lin, a yellow color and shiny, use as a critique of the many peoples and civilizations and nations, as it is used in ornaments and jewelery industry. Resides in the nature of the granules body within the rocks in the river bottoms, or in the form of veins in the ground, and often there is gold with other metals such as copper, lead, and discovered the largest mass of gold in Australia in 1896, he weighed 2,280 an ounce, and the advantage of gold lack of corrosion and softness It is also more density chemical elements.
Out of gold
Try Muslim scholars in the Middle Ages and others convert other elements into gold without success. Gold, which is on the ground may Otaha when the earth formation by cosmic ash, which is about the greatest supernova explosion. And combines it with other emerging ashes of the land components and formed the earth, but be ye all of the solar system. While creating a medium of stars like the sun light elements such as helium, oxygen, carbon, nitrogen and other iron (atomic weight 56), the heavy element such as gold and atomic weight of 197 - and a density of 3 and 19 g / cc - can not consist only in the intense heat, such as those that produce from the explosion of a star. Then Tstadm atoms and particles to each other and dock part Bbeda so heavy elements like gold composed. And all the heavy elements heavier than iron only supernova explosion consists.
Scientists have been able to in the modern era convert other elements into gold by neutrons or bumped Bonueh other atoms or in nuclear reactors, but way too expensive.
Purification of gold are being newly separation of dust and silt and other impurities by strong water currents to remove sand and alluvial minutes, and the remaining minutes of gold in place due to the high density of gold has been used mercury to melt the gold without sand and silt. Then concludes the final gold of mercury distillation. It also draws a presentation at the copper gold and silver mining. There are chemical methods to extract gold, which tightens its way cyanide, or melt the silver alloys in concentrated sulfuric acid, being purified gold with nitric acid first, then electrolysis.
