III. Choose the best word to make the sentence complete. There was one __________ of meanings that were essentially community integrative, that denied social differences.
【简答题】(9分)A、B、C、D、E、F六种短周期元素,它们的原子序数依次增大,A与D同主族;C与E同主族;B、C同周期;B原子最外层电子数比其次外层电子数多2;A是周期表中半径最小的元素,C的最外层电子数是内层电子的3倍;F元素是同周期元素中原子半径最小的主族元素。A、B、C、D、E形成的化合物甲、乙、丙、丁的组成如下表所示: 化合物 甲 乙 丙 丁 化学式 A 2 C A 2 C 2 D 2 C 2 D...