A.XY2一定能与水反应 |
B.XY2水溶液不可能呈碱性 |
C.符合要求的XY2物质的两种 |
D.X、Y一定不是同一主族的元素 |
A.r1 > r2 > r3 | B.r2> r1> r3 | C.r3 > r1 > r2 | D.r3 > r2 > r1 |
A.①② | B.②⑤ | C.只有④ | D.③④ |
| ⅠA | ⅡA | IIIA | ⅣA | ⅤA | ⅥA | ⅦA | 0 | ||||||
2 | | | | ① | ② | | ③ | | ||||||
3 | | ④ | ⑤ | | | ⑥ | ⑦ | ⑧ | ||||||
4 | ⑨ | | | | | | ⑩ | |
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