【简答题】All our dreams have something to do with our feelings, fears, longings, wishes, needs and memories. But something on the “outside” may affect what we ___1__. If a person is hungry or tired or cold, hi...
【简答题】Technology today has stolen away our voices and robbed our children of memories. I’ve been keeping count of how often people sing around the house these days. The fact is, they don’t. My earliest memo...
【简答题】(8分)Q、R、X、Y、Z五种元素的原子序数依次递增。已知: ①Z的原子序数为29,其余的均为短周期主族元素; ②Y原子价电子(外围电子)排布 m s n m p n ③R原子核外L层电子数为奇数; ④Q、X原子p轨道的电子数分别为2和4。 请回答下列问题: (1)Z 2+ 的核外电子排布式是 ,Z原子基态时简化电子排布式为 。 (2)Q与Y形成的最简单气态氢化物分别为甲、乙,下列判断正确的是 。...