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8.有一Z元素的原子可以符號 表示,下列對該原子的敘述中,哪一項正確?(A)是週期表中第17族元素(B)含有10個質子、9個中子、9個電子(C)含有1個價電子(D)趨向於失去1個電子,可作為還原劑
問題詳情
8.有一Z元素的原子可以符號
表示,下列對該原子的敘述中,哪一項正確?
(A)是週期表中第17族元素
(B)含有10個質子、9個中子、9個電子
(C)含有1個價電子
(D)趨向於失去1個電子,可作為還原劑
參考答案
答案:A
難度:
計算中
-1
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5.已知三角形ABC中, ,60°<∠A<120° 。試問共有多少個整數可能為 的值?(A)4(B)5(C)6(D)7
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63.如(圖 63) 所示為 555 波形產生器,其輸出之波形週期的近似值為何? (A)0.7(R1+2R2)C1 (B)0.7(R1+R2)C2(C)0.7(R1+2RL)C1 (D)0.7(R1+
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