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【題目】下列關于硅的說法中，不正確的是( )

A．硅是非金屬元素，它的晶體單質(zhì)是灰黑色有金屬光澤的固體

B．硅的導電性能介于導體和絕緣體之間，是良好的半導體材料

C．硅的化學性質(zhì)不活潑，常溫下不與任何物質(zhì)反應

D．加熱到一定溫度時，硅能與氯氣、氧氣等非金屬反應

【答案】C

【解析】硅雖然外形像金屬(有金屬光澤)，但實際上屬于非金屬；硅既有金屬性，又有非金屬性，其導電性也介于導體和絕緣體之間，是良好的半導體材料。硅的化學性質(zhì)不活潑(尤其是在常溫下)，但常溫下仍能與氟氣、氫氟酸和NaOH溶液等發(fā)生反應，加熱至一定溫度時，硅能與氯氣、氧氣等非金屬發(fā)生反應。

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