题目：
下列哪一组元素的原子间反应容易形成离子键
A.a和c
B.a和f
C.d和g
D.b和g
答案：
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参考答案：D
下列哪一组元素的原子间反应容易形成离子键 [ ] A.a和c B.a和f C.d
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