Question

general outer configuration of coinage metals

Answer 1

Like other groups, the members of this family show patterns in electron configuration, especially in the outermost shells, resulting in trends in chemical behavior, although roentgenium is probably an exception:

Z Element No. of electrons/shell
29 copper 2, 8, 18,
147 silver 2, 8, 18, 18,
179 gold 2, 8, 18, 32, 18,
1111 roentgenium 2, 8, 18, 32, 32, 17, 2 (predicted)

All Group 11 elements are relatively inert, corrosion-resistant metals. Copper and gold are colored.