【单选题】听力原文:M: Let's sit here and order some coffee while I'll show you some pictures. W: Good idea. But I'd prefer tea, please. M: This is Ted, my roommate. We live in the dormitory. W: Is this your room? Y...
【简答题】W、X、Y、Z 4种元素原子序数依次减小。已知W的原子序数为29;X原子p轨道共有11个电子;Y是第三周期主族元素,其部分电离能数据如下表;Z原子价电子排布式为ns n np n 。请回答下列问题 (1)W基态原子的电子排布式为__________。 (2)电负性:X___Y(填“>”、“=”或“(3)R是与X同主族的短周期元素。R的氢化物沸点比X的氢化物高,原因是_____________。 (...