[题目]下列关于硅的说法中.不正确的是( )A．硅是非金属元素.它的晶体单质是灰黑色有金属光泽的固体B．硅的导电性能介于导体和绝缘体之间.是良好的半导体材料C．硅的化学性质不活泼.常温下不与任何物质反应D．加热到一定温度时.硅能与氯气.氧气等非金属反应题目和参考答案——青夏教育精英家教网—

【题目】下列关于硅的说法中，不正确的是( )

A．硅是非金属元素，它的晶体单质是灰黑色有金属光泽的固体

B．硅的导电性能介于导体和绝缘体之间，是良好的半导体材料

C．硅的化学性质不活泼，常温下不与任何物质反应

D．加热到一定温度时，硅能与氯气、氧气等非金属反应

【答案】C

【解析】硅虽然外形像金属(有金属光泽)，但实际上属于非金属；硅既有金属性，又有非金属性，其导电性也介于导体和绝缘体之间，是良好的半导体材料。硅的化学性质不活泼(尤其是在常温下)，但常温下仍能与氟气、氢氟酸和NaOH溶液等发生反应，加热至一定温度时，硅能与氯气、氧气等非金属发生反应。

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