福建省部分蔬菜、水果中稀土元素含量调查报告福州市卫生防疫站周焕清，刘巧，黄海燕稀土元素指铜系元素和钪、钇元素的统称。在元素周期表中第Ⅲ副族金属元素，它们具有相似的电子结构，价电子构型、离子原子半径也相似，故有相似的化学性质，镧系分轻镧系和重镧系。轻镧... Investigation Report on Content of Rare Earth Elements in Vegetables and Fruits of Fujian Province Zhou Huanqin, Liu Qiao, Huang Haiyan The epidemic prevention stations in Fuzhou City refer to the copper elements, scandium and yttrium. In the periodic table of the third sub-group of metal elements, they have similar electronic structure, valence electron configuration, ion atomic radius is also similar, it has similar chemical properties, lanthanum sub-lanthanum and heavy lanthanide series. Light lanthan ...