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24 Hours Gold

Name: Gold
Symbol: Au
Atomic Number: 79
Atomic Weight: 196.966569
Melting Point: 1337.33 K (1064.18°C or 1947.52°F)
Boiling Point: 3129 K (2856°C or 5173°F)
Density: 19.282 grams per cubic centimetre
Phase at Room Temperature: Solid
Element Classification: Metal
Period Number: 6
Group Number: 11
Group Name: none

Gold is an attractive and highly valued metal known for at least 5500 years. The long history of gold is reflected in the many different words for this metal, although many names seem to mean originally "yellow (metal)". The origin of the chemical symbol "Au", and the word for gold was derived from the Latin word "aurum" which means "yellow".

Gold has been treasured since ancient times for its value, beauty and permanence. Most of the gold processed today is used in the manufacture of jewellery, however, because of its properties as a superior electrical conductivity and its resistance to corrosion, gold has emerged in as an essential industrial metal. Gold is also a well known as a coinage metal, and is also a standard for monetary systems in many countries.

Gold is the most malleable and ductile of all known metals, as well as a good conductor of heat and electricity and it does not tarnish or oxidize when it is exposed to the air, so it can be used to make electrical connectors and printed circuit boards. Gold is also a good reflector of infrared radiation and can be used to help shield spacecraft and skyscrapers from the sun's heat. Gold coated mirrors can be used to make telescopes that are sensitive to infrared light.

In the modern day, gold is used to perform critical functions in computers, communications equipment, spacecraft, jet aircraft engines, and a host of other products. Although gold is important to industry and the arts, it also retains a unique status among all commodities as a long-term store of value. Until recent times, it was considered essentially a monetary metal, and most of the bullion produced each year went into the vaults of government treasuries or central banks.

Gold occurs as a free metal and in tellurides, and is almost always associated with pyrite (FeS2) or quartz, and can be found in veins and in alluvial deposits.