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Silver is in group 11, it has an electronic configuration of [Kr]4d105s1

Silver metal is chemically relatively inert hence its use as a coinage metal. It is sensitive to sulfur compounds forming a black tarnish of silver sulfide Ag2S

Silver(I)It has some similarities to the alkali metals as it loses one electron to form the Ag+ ion. One difference is that the Ag+ ion is small and therefore polarising (Fajans rules) and the salts such as AgCl are more covalent in character than their alkali metal analogues. AgCl unlike NaCl is quite insoluble in water. Precipitation of AgCl and weighing the precipitate ("gravimetric" analysis) is a method of determining chloride. AgBr is particularly sensitive to light, producing Ag metal and was used in photographic film.

The silver mirror test for for aldehydes which reduce the Ag+ ion to Ag metal depositing it on the side of the vessel shows how easily Ag+ is reduced. (Note ketones do not reduce Ag+)

The oxide Ag2O is known readily forming when precipitated AgOH is allowed to dry.

Many compounds of silver(I) are best described as covalent, for example silver cyanide, silver sulfate where the coordination number of silver is 2 with linear bonding. Silver (I) forms many complexes with nitrogen ligands for example AgCl dissolves in liquid ammonia to form [Ag(NH3)2]+

Silver(II)Ag can form other compounds where it loses a further one or two electrons (from the 4d shell). The Ag2+ ion is produced in aqueous solution by oxidation of AgI compounds with ozone. These ions are not stable, unlike copper where Cu2+ is well known. e.g. copper sulfate.

AgF2 is known but AgCl2, AgBr2 are not. The oxide which appears to contain AgII is in fact a mixed valence oxide silver(I, III) oxide

Silver(III)Some silver(III) compounds are known, AgF3 which is red. This oxidises xenon the inert gas to form XeF2.

Then [Ag(OH)4]- ion containing Ag3+ is produced electrolytically in strong (12M) KOH solution. It gives the solution a yellow color which fades slowly, half life 100 mins or so.

The wikipedia article on silver is not very good imho and most text books are weak on summarising trends.

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