Silver argentum

Many of the metals used by ancient man— coppei (cuprum, Cu), silver (argentum, Ag), gold (aurum, Au), tin (stannum, Sn), and lead (plumbum, Pb)—are in relatively short supply. Ancient man found deposits of the first three occurring as the elementary metals. These three may also be separated from their ores by relatively simple chemical processes. On the othei hand, aluminum and titanium, though abundant, are much more difficult to prepare from their ores. Fluorine is more abundant in the earth than chlorine but chlorine and its compounds are much more common—they are easier to prepare and easier to handle. However, as the best sources of the elements now common to us become depleted, we will have to turn to the elements that are now little used. 

Chemical name Synonyms SI 1ver Silver argentum argentum CHEMLINE 1988 ... 

The Names and Symbols of the Elements. The names of the ele ments are given in order of atomic number in Table 4-1. The chemical symbols of the elements, used as abbreviations for their names, are also given in the table. These symbols are usually the initial letters of the names, plus another letter when necessary. In some cases the initial letters of Latin names are used Fe for iron (ferrum), Cu for copper (cuprum), Ag for silver (argentum), Au for gold (aurum), Hg for mercury (hydrargyrum). Th system of chemical symbols was proposed by the great Swedish chemist Jons Jakob Berzelius (1779-1848) in 1811. 

The nine elements whose symbols derive from old Latin names are sodium (NAtrium), potassium (Kalium), iron (FErrum), copper (CUprum), silver (ArGentum), tin (StaNnum), antimony (StiBium), gold (AUrum), and lead (PlumBum). 

There are several polymers among the active substances. Classical drugs include disinfectant protein silver (Argentum proteinicum) and colloidal silver (Argentum colloidale), which are mentioned in the pharmacopoeias of several countries. Dextran (its sterile solution) is used for plasma supplementation. Polypeptide and macropeptide hormones (e.g. hormones produced in the hypophysis, pancreas, and ovaries), enzymes (e.g. pepsin, pancreatin), polymer antibiotics (e.g. polymixin, vancomycin) must be mentioned. There are several polymer molecules among cytostatic agents, too [13]. 

Properties at 298.15 K (unless otherwise specified) Silver (Argentum) Gold (Aurum)... 

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