A Group 11 element is one in the series of elements in group 11 (IUPAC style) in the periodic table, consisting of transition metals copper (Cu), silver (Ag), and gold (Au). Roentgenium (Rg) belongs to this group of elements based on its theoretical electronic configuration, but it is a short-lived transactinide with a 22.8 seconds half-life that has only been observed in laboratory conditions. Although at various times societies have used other metals in coinage including aluminium, lead, nickel, stainless steel, tin, and zinc, the name "coinage metals" is used to highlight the special physio-chemical properties that make this series of metals uniquely well suited for monetary purposes. These properties include ease of identification, resistance to tarnish, extreme difficulty in counterfeiting, durability, fungibility and a reliable store of value unmatched by any other metals known.
Read more about Group 11 Element: History, Characteristics, Occurrence, Production, Applications, Biological Role and Toxicity
Famous quotes containing the words group and/or element:
“The virtue of dress rehearsals is that they are a free show for a select group of artists and friends of the author, and where for one unique evening the audience is almost expurgated of idiots.”
—Alfred Jarry (1873–1907)
“An element of exaggeration clings to the popular judgment: great vices are made greater, great virtues greater also; interesting incidents are made more interesting, softer legends more soft.”
—Walter Bagehot (1826–1877)