知识贝壳
知识贝壳
所属栏目：英汉双解化学
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 ） [阅读本文] >>