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Platinum is more ductile than gold, silver or copper, thus being the most ductile of pure metals, but it is less malleable than gold. [14] [15] Its physical characteristics and chemical stability make it useful for industrial applications. [16] Its resistance to wear and tarnish is well suited to use in fine jewellery.
A noble metal is ordinarily regarded as a metallic element that is generally resistant to corrosion and is usually found in nature in its raw form. Gold, platinum, and the other platinum group metals (ruthenium, rhodium, palladium, osmium, iridium) are most often so classified.
Most gold is mined as native metal and can be found as nuggets, veins or wires of gold in a rock matrix, or fine grains of gold, mixed in with sediments or bound within rock. The iconic image of gold mining for many is gold panning , which is a method of separating flakes and nuggets of pure gold from river sediments due to their great density .
The Platinum Metals and their Alloys. New York: The International Nickel Company, Inc., 1941: 16. — "Values ranging from 21.3 to 21.5 gm/cm 3 at 20 °C have been reported for the density of annealed platinum; the best value being about 21.45 gm/cm 3 at 20 °C." 21.46 g/cm 3 — Rose, T. Kirke. The Precious Metals, Comprising Gold, Silver and ...
A density of more than 5 g/cm 3 is sometimes quoted as a commonly used criterion and is used in the body of this article. The earliest-known metals—common metals such as iron, copper, and tin, and precious metals such as silver, gold, and platinum—are heavy metals.
Platinum and gold are two precious metals and … Continue reading → The post Platinum vs. Gold Investment: Which Is Better? appeared first on SmartAsset Blog.
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Argon has a density of 1.784 × 10 −3 g/cm 3, liquifies at −185.848 °C, and solidifies at −189.34 °C. Although non-toxic, it is 38% denser than air and therefore considered a dangerous asphyxiant in closed areas. It is difficult to detect because (like all the noble gases) it is colourless, odourless, and tasteless.