Group 12 element precludes there being much common chemistry between mercury and gold, though there are similarities between mercury(I) and gold(I) such as the formation of linear dicyano complexes, [M(CN)]. According to IUPAC's definition of transition metal as "an element whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell", zinc and cadmium are not transition metals, while mercury is. This is because only mercury is known to have a compound where its oxidation state is higher than +2, in mercury(IV) fluoride (though its existence is disputed, as later experiments trying to confirm its
Institute of Cast Metals Engineers Institute of Cast Metals Engineers The Institute of Cast Metals Engineers (ICME), originally the British Foundrymen's Association is a British professional engineering institution founded in 1904. It publishes the Foundry Trade Journal, which was established in 1902. It was founded as the British Foundrymen's Association in 1904. It was given a Royal Charter on 25 November 1921. On 11 October 2000, it changed its name to the Institute of Cast Metals Engineers. It is licensed by the Engineering Council to assess candidates for inclusion on its Register of professional Engineers and Technicians. The Institute's address is ICME Metalforming Centre, 47