Gold

Gold is a very precious metal and chemical element has the symbol Au, atomic number 79 in the periodic table. And called his condition before the multiplication by natural dust. Lane, brilliant yellow, use as a criticism when many of the peoples, cultures and nations, as it uses in the manufacture of jewelry and gems. Exists in nature in the form of granules inside the rocks in the river beds, or in the form of veins in the underground, and often there is gold with other metals, copper, lead, and discovered the largest mass of gold in Australia in 1896, weighed 2.280 ounces, and the advantage of gold low corrosion and smoothest It is also one of the most intensive chemical elements.

Last has a lot of gold when the Pharaohs And they make him the coffins of their kings and their vehicles as they made him a mask of the most beautiful masks known to mankind was made of pure gold of the Pharaoh Tutankhamun.

And a gold cash base used by the International Monetary Fund (IMF) and the Bank for International Settlements (BIS) and the Gold Astamlat other is used in dentistry and electronics.

[Edit] uses for gold
The unique characteristics of gold of watered and viability of the clouds, formation, and resistance to corrosion made it suitable for many purposes it is mixed with other metals such as copper or silver or nickel for the alloys more durable, and with the platinum-grade IAF industry as they are highly resistant to separation of chemicals, The gold is the metal of choice in many areas such as:

1 - in Jewelry & Accessories:

Much use of gold in jewelry adornment the so-called gold-yellow, and is accomplished by mixing gold with copper, silver and zinc to varying degrees resulting in a shot with gold multiple, and are measuring the degree of purity of gold parts (part per thousand) or Diameter according to the measurement the U.S., for example, the degree of purity, 1000 corresponding to 24 caliber, and the degree of purity 875 correspond to 21 caliber, while 750 corresponds to 18 caliber, and generally the color tends to pale whenever any caliber decrease a number decreased amount of gold in the alloy. The white gold is gold mixed with tin or palladium in order to make it white and used white gold jewelry usually crews.

2 - in medicine:

Used in dentistry because of the watered and resistance to corrosion in the mouth.
Solution of gold is also used in the treatment of rheumatism and inflammation of the bones.
Used radioactive gold (198) in the treatment of some types of cancer.

Gold [edit] Origin of Gold
Scholars tried to Muslims in the Middle Ages and others convert other elements into gold without success. Gold, who on earth has Otaha When you configure the Earth through the cosmic dust, which are for the explosion of Supernova. Collected ash emerging with the other components of the Earth and the Earth formed, but formed the solar system as a whole. While creating stars medium like the sun light elements, such as helium, oxygen, carbon, nitrogen and others to iron (weight atomic 56), the element of heavy such as gold, weight atomic 197 - The [[density intensity of 3 and 19 grams / cubic centimeters - can not consist only in heat severe as those that result from the explosion of a star. Then Tstadm atoms and particles attach to each other and part of the Bbeda thus consists of heavy elements such as gold. And all the heavy elements heavier than iron are only Supernova explosion.

Scientists have been able to convert in the modern era other elements into gold by shocking Bonoip neutrons or other atoms or in nuclear reactors, but the way expensive .