Question

(2004·廈門)已知MgO、KBr、NaF都為NaCl型晶體，試推斷它們的熔點(diǎn)由高到低的順序?yàn)?/P>

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A．MgO＞KBr＞NaF＞NaCl

B．KBr＞MgO＞NaF＞NaCl

C．MgO＞NaF＞NaCl＞KBr

D．NaF＞NaCl＞KBr＞MgO

Answer 1

答案：C
解析：