Chemical element of metals. Cu comes from Cuprum, Fe comes from Ferrum, Ag from Argentum. The symbols were not followed by a period (full stop) as with abbreviations. Later chemical elements were also assigned unique chemical symbols, based on the name of the element, but not necessarily in English. For example, sodium has the chemical symbol 'Na' after the Latin "natrium". The same applies to "W" (wolfram) for tungsten, "Fe" (ferrum) for iron, "Hg" (hydrargyrum) for mercury, "Sn" (stannum) for tin, "K" (kalium) for potassium, "Au" (aurum) for gold, "Ag" (argentum) for silver, "Pb" (plumbum) for lead, "Cu" (cuprum) for copper, and
Au (Munich) along with Au, forms the Au-Haidhausen borough of the city. Au was first documented on 12 December 1340 as "Awe ze Gysingen", with "Awe" meaning "Land on water". In 1808 Au was made a town as "Vorstadt Au" ("Suburb of Au"). In 1818, along with Untergiesing (what the settlement at Nockherberg had been referred to as), Au formed its own urban municipality. On 1 October 1854 the district was incorporated into Munich. Hans-Georg Schwarzenbeck, a 1974 World Cup champion has operated a stationery shop in Au for over 20 years. After the municipality had been made part of the city