Group 11 , numbered by IUPAC style , is a group of chemical element in the periodic table , consisting of copper ( Cu ) , silver ( Ag ) , and gold ( Au ) .
A Group 11 element is one in the series of elements in group 11 ( IUPAC style ) in the periodic table , consisting of transition metals which are the traditional coinage metals of copper ( Cu ) , silver ( Ag ) , and gold ( Au ) .