① | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | ② | ③ | ④ | | |
⑤ | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | 丙 | | | 丁 |
甲 | | | | | | | | | | | | | | | | | |
| | | | | | 乙 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
① | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | ② | ③ | ④ | | |
⑤ | | | | | | | | | | | | | | R | | | |
| | | | | | | | | | | | | | 丙 | | | 丁 |
甲 | | | | | | | | | | | | | | | | | |
| | | | | | 乙 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
A.原子半径:Z>R>W |
B.气态氢化物稳定性:HmW>HnR |
C.Y、Z、R三种元素组成的化合物水溶液一定显碱性 |
D.X2W6分子中各原子均满足8电子结构 |
a | | | |||||||||||||||
b | | | | c | d | e | f | | |||||||||
g | h | i | j | | k | l | m | ||||||||||
n | | | | | | | o | | | | | | | | | | |
A.铍(Be)是一种轻金属,它的氧化物的水化物可能具有两性 |
B.砹单质是一种有色固体,砹化氢很不稳定,砹化银是难溶于水的白色沉淀 |
C.硫酸锶难溶于水,但易溶于盐酸 |
D.硒化氢是无色、有毒、比硫化氢稳定的气体 |
A.X>Y>Z | B.Y>X>Z | C.Z>X>Y | D.Z>Y>X |
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