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金(Au)与银(Ag)与铂族金属合称为贵金属。贵金属在地壳中的含量很少,金在地壳中的含量为5‰,银为1/10万,并且很分散,开采和提取都很困难。因此金和白银的价格都很昂贵,得“贵金属”之称。黄金一直为资本主义国家利用作为国际贸易结算的手段,在古代,白银也被充当货币,所以金银又称之为货币金属。一、金金在自然界中多以自然金形式出现,呈亮黄色,常含有不同量的银,其中含银量小于5%者称为自然金,含银
Gold (Au) and silver (Ag) and platinum group metals collectively known as the precious metal. Precious metals are rare in the earth’s crust. Gold is 5 ‰ in the earth’s crust and 1/10 in silver, which is very scattered and difficult to extract and extract. Therefore, the price of gold and silver are very expensive, have “precious metal” said. Gold has been used by capitalist countries as a means of settling international trade. In ancient times, silver was also used as currency, so gold and silver are also called monetary metals. First, the gold and gold in the nature of the form of more natural gold, was bright yellow, often containing different amounts of silver, of which less than 5% of the amount of silver is called natural gold, silver