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怎样确定第三电子层的电子数
更新时间: 2020-07-06 00:00:00  

首先,观察该元素在第几周期,若在第三周期,则表明该元素第一、二电子层已经填满,依据元素各电子层能够容纳的电子的最大数目2n的平方,可以计算出前面两个电子层的电子总数为10,再观察该元素的原子序数,用原子序数减去10,即得第三电子层的电子数。

关键词: 怎样 确定 电子层 电子

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