 |
 |
| 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 jewels, in the sculpture,
and for the ornament s ince the beginning of the
recorded history. Metal occurs like nuggets or
grains in the rocks, under ground veins and in the
overwash phases. Gold is dense, soft, shining and
the most malleable substance and most malleable
known. Pure gold has a luminous yellow color
traditionally considered attractive. It is one of
metals of invention and formed the base for the gold
standard used before the collapse of the system of
Bretton Woods in 1971. 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. With STP it is attacked by regia aqua,
forming the acid chloroauric and by the solutions
alkalines of cyanide but not by hydrochloric acids,
nitric or sulphuric. All type of Latest Global News available on this single
Online News Portal www.News-Relay.com, Visit Now and Be updated about the
World. |
| |
|
|
|
|
