元素X核电荷数为a，它的阳离子Xm+与Y的阴离子Yn-的电子层结构相同
侯英超 |
发布日期：2010-05-31 21:10:00
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元素X核电荷数为a，它的阳离子Xm+与Y的阴离子Yn-的电子层结构相同，则元素Y的核电荷数【 】 A．m＋n＋a B．m—n—a C．m＋n—a D．a—m—n |
