Mostre de compuși ai germaniului preparate de descoperitorul elementului, Clemens Winkler În raportul său Legea Periodică a Elementelor Chimice din 1869, chimistul rus Dâmitri Ivanovici Mendeleev a prezis existența unor elemente chimice necunoscute, inclusiv cea a unui component care ar fi completat un loc vacant în grupa carbonului din Tabe
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These DLC CERTESS®CARBON coatings meet the benchmarks of numerous operating conditions useful for automotive as well as other general producing apps. Calico has produced a bunch of DLC coatings that come with various levels of various elements including Cr, CrN, W, WCC and Si having a top layer of amorphous carbon with hydrogen.This machinery, emb