I1I2I3I4I5I6I7145296的精选

问题详情：某元素的电离能如下，此元素位于元素周期表的族数是()I1I2I3I4I5I6I714.529.647.477.597.9551.9666.8A.ⅡA                         B．ⅢAC．ⅤA                  ...