同一週期的主族元素由左至右,原子半徑的變化趨勢為何?
Answer and explanation
Correct answer: D. 逐漸減小
- Step 1: 核電荷增加而電子層數不變,核對外層電子的吸引力增強,半徑變小。
Answer
逐漸減小.
Why not the others: 逐漸增大、先增大後減小、幾乎不變不符合題意。
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