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【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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