gold and silver are called noble metals because
They do not, normally, react in their natural environment
Ladies of royalty wear them as jewellery
They are worn by noblemen
Even acids cannot dissolve them with out strong heat.
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1). In physics, the definition of a noble metal is most strict. It requires that the d-bands of the electronic structure be filled. From this perspective, only copper, silver and gold are noble metals, as all d-like bands are filled and do not cross the Fermi level.
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