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
Occupation of the Hainburger Au Occupation of the Hainburger Au The Occupation of the Hainburger Au wetlands in December 1984 marked a turning point for awareness in German speaking central Europe and was of great significance for the development of democratic processes in Austria. The Hainburger Au is a large naturally occurring flood plain bordering the River Danube at, and upstream of, Hainburg in Lower Austria. It is a short distance to the east of Vienna's main airport. Since 1996 it has been part of the Danube-Auen National Park. In February 1983 the of the World Wide Fund for Nature (WWF) began a campaign under