19.(12分)(1)(2分+2分)
ⅠA ⅡA ⅢA ⅣA ⅤA ⅥA ⅦA
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③ |
④ |
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① |
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⑤ |
⑥ |
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② |
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(2)
(1分),三角锥形(1分)
(3)高(1分)
(4)离子晶体(1分) 结构图(2分)
(5)液态(1分),原子反应堆的导热剂(1分)