Metal ions confer flavor and odor to metallic elements and compounds. This makes sense since the metal is unreactive. High-purity metallic gold is odorless and tasteless.Among other applications, it is used in electronics, electrical wiring, dentistry, medicine, radiation shielding, and in coloring glass. Gold has many uses aside from its monetary and symbolic value.While acids dissolve most metals, a special mixture of acids called aqua regia is used to dissolve gold. It is relatively unreactive and resists degradation by air, moisture, or acidic conditions. The remaining portion of the metal usually used in gold jewelry and other items is silver, but items can also consist of other metals or a combination of metals, such as platinum, copper, palladium, zinc, nickel, iron, and cadmium. Gold has several qualities that have made it exceptionally valuable throughout show. Pure elemental gold is 24 karats, while 18-karat gold is 75 percent pure gold, 14-karat gold is 58.5 percent pure gold, and 10-karat gold is 41.7 percent pure gold. gold (Au), chemical element, a dense lustrous yellow treasured metal of Group 11 (Ib), Period 6, of the periodic table of the define. Gold metal flakes may be eaten in foods or drinks, although it is a common allergen for some. Wars have been fought over it and countless numbers have died trying to gain it or protect it. History and Uses: An attractive and highly valued metal, gold has been known for at least 5500 years. It is probably the oldest precious metal known to humans.
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