Silver ground state electronic configuration

What is the ground-state electron configuration expected for each of the following elements (a) silver (b) beryllium ... 

Silver and rubidium both form +1 ions, but silver is far less reactive. Suggest an explanation, taking into account the ground-state electron configurations of these elements and atomic radiL... 

As expected there is a close resemblance in the chemical behaviour of technetium and rhenium whereas the properties of both elements differ considerably from those of manganese. The electronic configuration of technetium in the ground state is 4d 5s. Technetium is a silver-grey metal which tarnishes slowly in moist air. 

A much more plausible explemation considers the silver activator to have the Ag- electronic configuration. The ground state would then be ... 

A hundred years ago results from physics and physical chemistry had already influenced the conceptual status of inorganic chemistry. In the present context, it may be noted, in particular, how the experimental study of electrolysis processes had led to the concepts of cations, anions, and electrochemical equivalents. An important conclusion from these studies was, for example, that the monovalency of silver and the divalency of copper in their normal salts were more than just stoichiometric attributes. This conclusion, based upon integers, gives rise to the most important class of statements in chemistry, which we would like to call qualitative in a strong sense. We shall see further examples of this kind of statement below in connection with oxidation states, atomic electron configurations, and ground state specitications. 

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