单质碘的熔沸点较低,其原因是 A.碘的非金属性较弱          

单质碘的熔沸点较低,其原因是

A.碘的非金属性较弱                B.碘分子中键能较小

C.碘晶体中碘分子间以范德华力结合  D.I-I共价键的键长较长

答案

C

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