【单选题】Listen to the following passage and complete the following 5 incomplete s tatements. When the first rose appeared on earth it was pure white. A nightingale saw the rose and flew over to see it more cl...
【简答题】(8分)A、B、C、D、E五种元素在周期表里的位置如下表所示:A、B、C为同主族元素,A为该族中原子半径最小的元素;D、B、E为同周期元素,E为该周期中原子半径最小的元素。D元素名称是____ ,在周期表第____ ____ 周期,第____ 族,其原子结构示意图____ ____ 。 A D B E C