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Gold is a chemical element with symbol (of
Latin named sound aurum) and the atomic number 79. It is a noble metal
strongly sought, having been employed like money, stock of value, in the
jewelery, the sculpture, and for the ornament since the beginning of the
recorded history. Metal occurs like nuggets or grains in the rocks, under
ground veins and in the overwash phases. It is one of metals of invention.
Gold is dense, soft, shining and the most malleable substance and most
malleable known. Pure gold has a luminous yellow color traditionally
considered attractive.
Gold formed the base for the gold standard used before the collapse of the
system of Bretton Woods. The code of currency of OIN of the gold ingot is
XAU.
The modern industrial uses include the dentistry and electronics, where gold
traditionally found the use because of its good corrosion resistance
oxidizing.
Chemically, gold is a metal of transition and can form the trivalent and
univalent cations during solvation but is attacked by chlorine, fluorine,
the regia of aqua and cyanide. Gold dissolves out of mercury, formant of
alloys of amalgam, but does not react with him. Gold is insoluble in nitric
acid, which will dissolve silver plated noninvaluable metals and, and it is
the base of under the name of gold refining by known technique inquartation
and departure . The nitric acid was employed a long time to confirm the
presence of gold in the articles, and it is the origin of the familiar limit
, acid test referring to a test of gold standard for the true value. All type of Latest Global News available on this single
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