問題詳情
45.( )如附圖為一原子的元素符號，則有關此元素符號的敘述，下列何者正確？
(A)此為氯原子
(B)此原子的質子數有13個
(C)此原子的中子數有27個
(D)此原子的電子數有14個 
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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