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For the curious, Sc is the symbol for the element "Scandium", which is element number 21 in the periodic table of elements.Scandium was first discovered in 1879 by Lars Fredrik Nilson. The element is present in minerals that at the time could only be found in Scandinavia, hence the name. Scandium is a very light silver-white metal which has been of increasing interest lately in the design of spacecrafts due to its high melting point. An artificially produced radioactive isotope is used as a tracer in studies of oil wells and pipelines. You can find more information about this highly interesting element at www.scandium.org and the Scandium Wikipedia entry

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