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Precious metals

"Precious metals are metals that are found in the free state in nature, that is, they are not combined with other elements to form compounds. However, they can be found in the form of oxide or attached to other elements. They are rare metallic chemical elements and They have high economic value. Their demand is driven by their practical use and their role as investments and store of value. These metals have been priced higher than common industrial metals. They tend to be less reactive than most elements. They are ductile and very shiny. The best-known precious metals are coin metals, which are those that have been used in coin alloys. The best-known are gold and silver. Both have industrial uses, but above all they are known for its use in art and jewelery Other precious metals are those of the platinum group such as palladium, rhodium and ruthenium. Gold (Au): Chemical element with atomic number 79 from group 11 of the periodic table of elements. It is a metal that is difficult to find in nature and that is why it is highly valued for its rarity. It is the most malleable and ductile metal known. Silver (Ag): Chemical element with atomic number 47 from group 11 of the periodic table. In nature it can be found as part of different minerals (in the form of sulfur) or free. It is rare in the earth's crust and its production is obtained as a by-product of the treatment of gold, copper, lead, and zinc mines. Platinum (Pt): Chemical element with atomic number 78 from group 10 of the periodic table. It is found as a metal or in different minerals along with nickel and copper. It is resistant to corrosion. Rhodium (Rh): Chemical element with atomic number 45 from group 9 of the periodic table. It is a rare metal and belongs to the platinum group. It is generally found in platinum mines and in some platinum alloys it is used as a catalyst. Palladium (Pd): Chemical element with atomic number 46 from group 10 of the periodic table. It is not very abundant and belongs to the platinum group. It is mined in copper and nickel mines. It has the lowest melting point of the platinum group (1555 ° C) Ruthenium (Ru): Chemical element with atomic number 44 from group 8 of the periodic table. It is rare and belongs to the platinum group. It is generally found in platinum mines. Osmium (Os): Chemical element with atomic number 76 from group 8 of the periodic table. It belongs to the platinum group and is used in some iridium and platinum alloys. It can be found alloyed in platinum ores and its tetroxide. It is the densest natural element that exists (22610 kg / m3) Iridium (Ir): Chemical element with atomic number 77 from group 9 of the periodic table. The second most dense element (22 5601 kg / m3) and the most resistant to corrosion The recycling of precious metals is an increasingly important source of supplies. Electronic scrap has this type of metal, so the recycling of these resources is also known as urban mining. Its recycling is very important so that natural resources are not depleted. The amount of recycled precious metals is increasingly important. "

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