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- Name : Gold
- Symbol : Au
- Atomic # : 79
- Atom weight: 196.967
- Melting P. : 1064.4
- Boiling P. : 2808
- Oxidation : +1, +3
- Pronounced : GOLD
- From : Anglo-Saxon in origin; Symbol, Au, taken from the Latin name,
- aurum, "shining dawn"
- Identified : Prehistoric origin
- Appearance : Soft, malleable, yellow metal
- Note : There is enough gold in this planet to make a cube of metal
- 60 feet wide.
-
- [Properties]
-
- Gold has a very distinctive yellow color. It is incredibly malleable and
- ductile - a single ounce of pure gold can be beaten out to a sheet that is
- about 300 feet square. It is about as heavy as ordinary lead and, like
- lead, pure gold is easily cut with a knife.
- Few elements react readily with gold under normal environmental
- conditions. This accounts for why most gold is mined as flakes and nuggets
- of the yellow metal itself. It does react somewhat with chlorine gas and
- aqua regia (a mixture of hydrochloric and nitric acids).
- Gold is a very good conductor of electricity; because it does not
- normally corrode, it is often used as a plating material for electrical
- connectors. Gold is also a good reflector of heat-carrying infrared
- radiation, so a thin film of gold is applied to the glass in skyscrapers
- in order to reduce the amount of internal heating from sunlight.
- The purity of gold is measured in units of karat. Pure gold is rated at
- 24 karat. An alloy that is 50% gold is 12 karat. The amount of gold in
- common jewelry is reckoned at 18 karat, meaning that the percentage of
- gold is 18/24 times 100, or 75%.
-