知識貝殼
知識貝殼
所屬欄目：英漢雙解化學
A group of 15 radio-active elements whose electronic configura-tions display filling of the 5f level. As withthe lanthanoids,the first member,actini-um,has no f-electrons (Ac [Rn] 6d17s2)but other members also show deviationsfrom the smooth trend of f ele ......（本文共 673 字 ） [閱讀本文] >>