4.主要化学元素、原子量及密度

元素名称化学符号原子量密度/(g/cm3)元素名称化学符号原子量密度/(g/cm3)银Ag107.8810.5铌Nb92.918.6铝Al26.972.7镉Cd112.418.65砷As74.915.73钴Co58.948.8金Au197.219.3铬Cr52.017.19硼B10.822.3铜Cu63.548.93钡Ba137.363.5氟F19.001.11铍Be9.021.9铁Fe55.857.87铋Bi209.009.8锗 ......（本文共 652 字 ）     [阅读本文] >>