Some metals occurring in nature are very rare and also have a very high economic and industrial value. These can be termed as precious metals. A precious metal does not react with other elements very easily and also possesses a comparatively higher melting point. Long ago, precious metals were made use of as coins for currency. Some of the most important precious metals are silver, palladium, platinum and of course, gold.
The palladium precious metal, which is silvery white and lustrous in appearance, was first seen by William Hyde Wollaston. The name is derived from the asteroid Pallas. Rhodium, osmium, ruthenium and Iridium along with palladium form the platinum group of metals as they show characteristics similar to the precious metal platinum.
The precious metal platinum is a very rare, transition element found on the surface of the earth with a dense and grayish white appearance. Platinum is removed from its nickel and copper ores which are most commonly found in South Africa, where nearly eighty percent of the platinum of the world has been discovered. Platinum has the quality of non- corrosiveness even when heated to great temperatures and thus has been named a noble metal. In its native state, as it is usually found, it can be seen along the fertile river banks and was traditionally used for producing art objects.
Both the above precious metals can be used to make electrical contacts, catalytic converters and also in dentistry and as jewelry. Their scarcity makes them very much in demand and it is also used in a number of industrial applications. For instance, the precious metal platinum is found in electrodes and also in resistance thermometer. A Platinum compound, Cisplatin is made of use of in chemotherapy as it can help to combat certain forms of cancer.
Platinum is silvery gray in color and is also very lustrous and hence used in jewelry. It does not tarnish soon and is quite sturdy, and hence quite the ideal element to use for jewelry making. Additionally, the precious metal platinum has great electrical characteristics and can be used in various industrial processes as well.
The palladium precious metal, which is silvery white and lustrous in appearance, was first seen by William Hyde Wollaston. The name is derived from the asteroid Pallas. Rhodium, osmium, ruthenium and Iridium along with palladium form the platinum group of metals as they show characteristics similar to the precious metal platinum.
The precious metal platinum is a very rare, transition element found on the surface of the earth with a dense and grayish white appearance. Platinum is removed from its nickel and copper ores which are most commonly found in South Africa, where nearly eighty percent of the platinum of the world has been discovered. Platinum has the quality of non- corrosiveness even when heated to great temperatures and thus has been named a noble metal. In its native state, as it is usually found, it can be seen along the fertile river banks and was traditionally used for producing art objects.
Both the above precious metals can be used to make electrical contacts, catalytic converters and also in dentistry and as jewelry. Their scarcity makes them very much in demand and it is also used in a number of industrial applications. For instance, the precious metal platinum is found in electrodes and also in resistance thermometer. A Platinum compound, Cisplatin is made of use of in chemotherapy as it can help to combat certain forms of cancer.
Platinum is silvery gray in color and is also very lustrous and hence used in jewelry. It does not tarnish soon and is quite sturdy, and hence quite the ideal element to use for jewelry making. Additionally, the precious metal platinum has great electrical characteristics and can be used in various industrial processes as well.
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