(Video), Child labour behind smart phone and electric car batteries, Child Labor Revelation Prompts Apple to Make Supplier Policy Change, Apple cracks down further on cobalt supplier in Congo as child labor persists, "U.S. cobalt lawsuit puts spotlight on 'sustainable' tech", "Apple, Google Fight Blame For Child Labor In Cobalt Mines - Law360", The Canadian Ghost Town That Tesla Is Bringing Back to Life, "The Hardening of Platinum Alloys for Potential Jewellery Application", Carmakers' electric dreams depend on supplies of rare minerals, How To Minimize Tesla's Cobalt Supply Chain Risk, "As Cobalt Supply Tightens, LiCo Energy Metals Announces Two New Cobalt Mines", We May Not Have Enough Minerals To Even Meet Electric Car Demand, "State of Charge: EVs, Batteries and Battery Materials (Free Report from @AdamasIntel)", "Muskmobiles running rivals off the road", "Electric car future may depend on deep sea mining", Tesla & GE Face Major Shortage Of Ethically Sourced Cobalt, Electric cars yet to turn cobalt market into gold mine – Nornickel, "Cobalt Prices and Cobalt Price Charts - InvestmentMine", "Tesla joins "Fair Cobalt Alliance" to improve DRC artisanal mining", "Tesla joins Fair Cobalt Alliance in support of moral mining efforts", CObalt-free Batteries for FutuRe Automotive Applications website, "Tesla's battery strategy, implications for LG and Samsung", "Tesla to make EV battery cathodes without cobalt", "Ueber die Bereitung einer blauen Farbe aus Kobalt, die eben so schön ist wie Ultramarin.  After oversupply, the price dropped to a more normal $15 in 2019. The LD50 value for soluble cobalt salts has been estimated to be between 150 and 500 mg/kg. weld integrity radiographs), density measurements (e.g. the Cativa process. 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The sum of the oxidation numbers in a monatomic ion is equal to the overall charge of that ion. Any free element has an oxidation number equal to zero. –2. , In February 2018, global asset management firm AllianceBernstein defined the DRC as economically "the Saudi Arabia of the electric vehicle age," due to its cobalt resources, as essential to the lithium-ion batteries that drive electric vehicles. Cobalt-57 is used as a source in Mössbauer spectroscopy and is one of several possible sources in X-ray fluorescence devices. In order to learn how to find the oxidation number of an atom in a given compound, it is important to learn what oxidation numbers are. In the case of neutral compounds, the sum of all the oxidation numbers of the constituent atoms totals to zero. It was discovered that the volcanic soils lacked the cobalt salts essential for the cattle food chain. , The main ores of cobalt are cobaltite, erythrite, glaucodot and skutterudite (see above), but most cobalt is obtained by reducing the cobalt by-products of nickel and copper mining and smelting.  The Democratic Republic of the Congo (DRC) currently produces 63% of the world's cobalt. , The products of the above-mentioned processes are transformed into the cobalt oxide (Co3O4). Oxygen is assigned a -2 oxidation number in covalent compounds. Oxidation number of [CoCl 2 (NH 3) 4] + = Oxidation number of (Co + 2Cl + 4×0) = +1. , Proteins based on cobalamin use corrin to hold the cobalt.  Exploration in 2016–2017 included the area around Cobalt, Ontario, an area where many silver mines ceased operation decades ago. 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