why gold is very expensive metal and why it is ductile and tell me the full properties of gold.
Answers
Ductility is the property of being drawn into wire. ... The ductility of the metals decreases as the temperature increases because metals become weak at increasing temperature. Gold and platinum are the earth's most ductile metals, but gold has a significantly greater ductility than platinum.
Gold is a metal. And like any metal, it is extracted from the ground and then purified. Gold is expensive because of the high cost of production associated with it. Also, gold is extremely popular, which makes its price rise more.
Answer:
Gold is a metal. And like any metal, it is extracted from the ground and then purified. Gold is expensive because of the high cost of production associated with it. Also, gold is extremely popular, which makes its price rise more
Explanation:
Gold is ductile: It can be drawn out into the thinnest wire. One ounce of gold can be drawn into 80 kilometers (50 miles) of thin gold wire, five microns, or five millionths of a meter, thick. This sample is 0.20 millimeters (0.008 inches) in diameter.
Gold conducts heat and electricity. Copper and silver are the best conductors, but gold connections outlast both of them because they do not tarnish. It is not that the gold lasts longer, but that it remains conductive for a longer time.
Gold is highly reflective of heat and light. The visors of astronauts' space helmets receive a coating of gold so thin (0.00005 millimeters, or 0.000002 inches) that it is partially transparent. The astronauts can see through it, but even at that thinness the gold film reduces glare and heat from sunlight.
Gold is prized for its beauty. Jewelers and metalsmiths value it as a metal that can be embossed, hammered, cast, stretched or twisted.