Gold metal germanium, elemental

By and large, of the 86 naturally occurring elements in nature, some 20 or so are deemed to be essential as trace elements and approximately 10 are envisaged as toxic. Most of these essential trace elements are metals and are able to form simple ionic compounds or complex coordination compounds. However, some of the metallic elements such as cobalt, palladium, platinum, gold, mercury, germanium, tin, lead. 

Metallic liquids can also experience fractional crystallization. The abundances of trace elements such as gold, gallium, germanium, and iridium and the major element nickel in various classes of iron meteorites vary because of the separation of crystalline metal phases (kamacite or taenite). 

Solids have traditionally been divided into three classes when the electrical properties are described. Those that conduct electricity well are called conductors. This group is typified by metals. Those solids that conduct poorly are called semiconductors. This group contains elements such as silicon and germanium, and large numbers of minerals such as the iron sulphide fool s gold, FeS2- Solids that do not conduct electricity are called insulators or dielectrics. Many oxides, such as magnesium oxide, MgO, and most polymers, such as polyethylene, are insulators. 

Incorporation of elements other than thorium into yttrium sesquicarbide also leads to a resultant enhancement of the superconducting temperature (Krupka et al. 1969b). These elements include the group IV and VI transition metals, as well as gold, germanium and silicon. But, in these cases, it is necessary to ensure the solubiUty of these elements in the parent sesquicarbide lattice. 

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