Group 11, by modern
IUPAC numbering, is a
group of
chemical elements in the
periodic table, consisting of
copper (Cu),
silver (Ag), and
gold (Au).
Roentgenium (Rg) is also placed in this group in the periodic table, although no chemical experiments have yet been carried out to confirm that it behaves like the heavier
homologue to gold. Group 11 is also known as the
coinage metals, due to their former usage. They were most likely the first three elements discovered. Copper, silver, and gold all occur naturally in
elemental form.