10/26/09

Gold (Au)


Gold (Au)


http://webelements.com/gold/




Phyiscal properties; gold can be used for anything such as: jelwery, coins etc.





Melting point; 1337 k





Boiling point; 3081 k





Density; 19.31 g/cm3





Protons; 79 Neutrons; 118





Phase: solid at room temperature , when melted is a liquid.











Background;Gold (pronounced /ˈɡoʊld/) is a chemical element with the symbol Au (Latin: aurum) and an atomic number of 79. It has been a highly sought-after precious metal for coinage, jewelry, and other arts since the beginning of recorded history. The metal occurs as nuggets or grains in rocks, in veins and in alluvial deposits. Gold is dense, soft, shiny and the most malleable and ductile pure metal known. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. It is one of the coinage metals and formed the basis for the gold standard used before the collapse of the Bretton Woods system in 1971.









YANIZ YANEZ

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