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Group 11 element
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<table><tbody><tr><th colspan="2">↓ <a href="/facts/Period_(periodic_table)/WpGUFh5V">Period</a></th></tr><tr><th><a href="/facts/Period_4_element/BgDFfE26">4</a></th><td><a href="/facts/Copper/I8PEE8oX">Copper</a> (Cu)29 <a href="/facts/Transition_metal/0slGWoLQ">Transition metal</a></td></tr><tr><th><a href="/facts/Period_5_element/xLJUWWDS">5</a></th><td><a href="/facts/Silver/xXe41BGg">Silver </a> (Ag)47 <a href="/facts/Transition_metal/0slGWoLQ">Transition metal</a></td></tr><tr><th><a href="/facts/Period_6_element/9YleCXwf">6</a></th><td><a href="/facts/Gold/1znknojp">Gold</a> (Au)79 <a href="/facts/Transition_metal/0slGWoLQ">Transition metal</a></td></tr><tr><th><a href="/facts/Period_7_element/H5QuVHGQ">7</a></th><td><a href="/facts/Roentgenium/LEhvJaJQ">Roentgenium</a> (Rg)111 unknown chemical properties</td></tr><tr><td colspan="2"><p><i>Legend</i></p><table><tbody><tr><td><a href="/facts/Primordial_element/lFAUqHDv">primordial element</a></td></tr><tr><td><a href="/facts/Synthetic_element/azU9Nr1m">synthetic element</a></td></tr></tbody></table></td></tr></tbody></table> <p>Group 11, by modern <a href="/facts/IUPAC/2AV6myCK">IUPAC</a> numbering, is a <a href="/facts/Group_(periodic_table)/YGBcUabv">group</a> of <a href="/facts/Chemical_elements/0jducgWD">chemical elements</a> in the <a href="/facts/Periodic_table/umdGIfUb">periodic table</a>, consisting of <a href="/facts/Copper/I8PEE8oX">copper</a> (Cu), <a href="/facts/Silver/xXe41BGg">silver</a> (Ag), <a href="/facts/Gold/1znknojp">gold</a> (Au), and <a href="/facts/Roentgenium/LEhvJaJQ">roentgenium</a> (Rg), although no chemical experiments have yet been carried out to confirm that roentgenium behaves like the heavier <a href="/facts/Homologous_series/7PKCuvzm">homologue</a> to gold. Group 11, more specifically, the first three members are also known as the <i><a href="/facts/Coinage_metals/KVIkJwCr">coinage metals</a></i>, due to their usage in minting coins—while the rise in metal prices mean that silver and gold are no longer used for circulating currency, remaining in use for bullion, copper remains a common metal in coins to date, either in the form of copper <a href="/facts/Cladding_(metalworking)/CSJnnb4g">clad coinage</a> or as part of the <a href="/facts/Cupronickel/KE4WSdu3">cupronickel</a> alloy. They were most likely the first three elements discovered. Copper, silver, and gold all occur naturally in <a href="/facts/Native_element/kWjWAus5">elemental form</a>. </p>