Silver Mine - The Largest Silver Mining In History - Top Documentary Films скачать в хорошем качестве

Silver Mine - The Largest Silver Mining In History - Top Documentary Films

Silver Mine - The Largest Silver Mining In History - Top Documentary Films. Welcome to TOP DOCUMENTARY FILMS - home of the best documentaries, movies and films. Silver is a chemical element with symbol Ag (from the Latin argentum, derived from the Greek ἀργός: "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes alongside gold:[4] while it is more abundant than gold, it is much less abundant as a native metal.[5] Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of the seven metals of antiquity, silver has had an enduring role in most human cultures. Other than in currency and as an investment medium (coins and bullion),[6] silver is used in solar panels, water filtration, jewellery, ornaments, high-value tableware and utensils (hence the term silverware), in electrical contacts and conductors, in specialized mirrors, window coatings, in catalysis of chemical reactions, as a colorant in stained glass and in specialised confectionery. Its compounds are used in photographic and X-ray film. Dilute solutions of silver nitrate and other silver compounds are used as disinfectants and microbiocides (oligodynamic effect), added to bandages and wound-dressings, catheters, and other medical instruments. Read More About "Silver Mine - The Largest Silver Mining In History - Top Documentary Films" - https://en.wikipedia.org/wiki/Silver Subscribe to Top Documentary Films to be the first to receive updates -    / @topdocumentaryfilms8214   Join us in our top documentary films community discussion by following us in our top documentary films Google page - https://plus.google.com/u/0/b/1084940... Thanks for watching TOP DOCUMENTARY FILMS - home of the best documentaries, movies and films. #Documentaries #Movies #DocumentaryMovies #TopDocumentaryFilms #Entertainment #Education Thanks for watching "Silver Mine - The Largest Silver Mining In History - Top Documentary Films"