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氧离子和氧原子半径大小比较
更新时间: 2020-10-07 00:00:00  

氧离子的半径比氧原子的半径大。

比较粒子大小的方法如下:

1、 先比较电子层的层数,层数多者半径大。2、 若电子层数相同,再比较核电荷数,多者半径大。3、 若电子层数也相同,则比较最外层电子数,多者半径大。 氧原子和氧离子都有两个电子层,核电荷数都是8,而氧离子最外层有8个电子,氧原子最外层有6个电子,所以氧离子的半径大。

关键词: 离子 氧原子 半径 大小 比较

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