下列化学用语正确的是( ) A.五氧化二磷的化学式:P2O5 B. 硅的元素

下列化学用语正确的是(  )

A.五氧化二磷的化学式:P2O5

B. 硅的元素符号:SI

C.碳酸根离子:CO3

D. 三个氧原子:O3

答案

A

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