Cu 銅 29 63.546 11 4 d 29 1083.0 2567.0 [Ar] 3d10 4s1 2 8 18 1 8.96 0.0068% Copper Cubic: Face centered 1.9 1.85 {"1":"745.5","2":"1957.9","3":"3555","4":"5536","5":"7700","6":"9900","7":"13400","8":"16000","9":"19200","10":"22400","11":"25600","12":"35600","13":"38700","14":"42000","15":"46700","16":"50200","17":"53700","18":"61100","19":"64702","20":"163700","21":"174100","22":"184900","23":"198800","24":"210500","25":"222700","26":"239100","27":"249660","28":"1067358","29":"1116105"} 746 118.4 138 +2,1 1.28 7.1 13.14 300.5 0.385 401.0 0 Solid, Diamagnetic, Conductor, TransitionMetal, Metal, Stable, Natural KOP-er Malleable, ductile, reddish-brown metal. Most often used as an electrical conductor. Also used in the manufacture of water pipes. Its alloys are used in jewelry and for coins. Pure copper occurs rarely in nature. Usually found in sulfides as in chalcopyrite (CuFeS2), coveline (CuS), chalcosine (Cu2S) or oxides like cuprite (Cu2O). sWvp_Z2kfYs Copper

钾元素的名称来源于德文和斯堪的纳维亚半岛地区的旧式名称

金属架第一次被分离出来是1807年的汉弗莱 戴维，从腐蚀过的壶垢中用电堆电解法得到的

钾是第一个用电解法得到的元素单质 英文“钾盐草碱” 29 From the Latin word "cuprum" meaning the island of "Cyprus"

使用钾时必须保护好皮肤和眼睛

食品中钾含量过少会导致胃酸缺乏综合症

钾盐草碱因其肥料作用有大量的需求

土壤中的钾元素是一种植物生长需要的重要的组分

硝酸钾是一种主要的枪药的气爆药

氢氧化钾是生产软肥皂和碱性电池电解液