Group 12 element have zinc in its active site. In 1817, cadmium was discovered in Germany as an impurity in zinc carbonate minerals (calamine) by Friedrich Stromeyer and Karl Samuel Leberecht Hermann. It was named after the Latin "cadmia" for "calamine", a cadmium-bearing mixture of minerals, which was in turn named after the Greek mythological character, Κάδμος Cadmus, the founder of Thebes. Stromeyer eventually isolated cadmium metal by roasting and reduction of the sulfide. In 1927, the International Conference on Weights and Measures redefined the meter in terms of a red cadmium spectral line (1 m = 1,553,164.13 wavelengths). This definition has since
Ore Mountain cuisine of potato are also common, the best-known is the so-called "Rauchemaad". At Christmas, which is especially richly celebrated in the Ore Mountains, many households still make "Neinerlaa". The ingredients vary from region to region, sometimes even from village to village. In any case, on Christmas Eve nine elements are served, for example, bratwurst, sauerkraut and lentils, each element supposedly having a special significance for the coming year. For example, dumplings stand for wealth and celery for fertility Ore Mountain cuisine Cuisine in the Ore Mountains was dominated for centuries by the changing economic circumstances of the mining, handicraft and forestry