下表是元素�期表中部分元素的原子结构示意图请分析ⅠaⅡaⅢa第2�期第3�期x第4�期y �在化学反应中mg原子易 电子�na 离子核外 Template




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tomski下表是元素�期表中部分元素的原子结构示意图请分析ⅠaⅡaⅢa第2�期第3�期x第4�期y �在化学反应中mg原子易 电子�na coloring