一、金的一般知识及用途金gold(Au),周期表Ib族化学元素,比重大、亮黄而富光泽的贵金属。是电和热的良导体、质软,在金属中其延展性最佳。28克金可锤打成约30平方米的薄片——金箔,这种金箔能透过绿色光。这种稀有金属能以相当纯的形式存在于自然界,色泽悦目易于加工、且不会锈蚀或失去光泽,因而成为最早引人注意的金属之一。埃及、米诺、亚述 First, the general knowledge and use of gold Gold (Au), Periodic Table Ib chemical elements, the proportion of large, bright yellow and shiny precious metals. Is a good conductor of electricity and heat, soft, ductile in the metal the best. 28 grams of gold can hammer into about 30 square meters of sheet - gold foil, the gold foil through the green light. This rare metal can be found in nature in a fairly pure form, appealing in color and ease of processing without rusting or tarnishing, making it one of the earliest metals to notice. Egypt, Mino, Assyria