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读书笔记:元素周期表

  • 2026-02-04 08:43:09
读书笔记:元素周期表

读书笔记：元素周期表

思考问题一，同一元素质子和电子相同，那么和中子相同吗？
1，同一元素，质子和电子相同，但和中子不同
2，质子带正电，电子带负电，中子不带电
3，质子数相同而中子数不同的同一元素的不同原子互称为同位素
4，原子核由质子和中子组成，原子的所有质量几乎都集中在原子核上
5，电子中的电子围绕电子核运动。它们所在的不同区域称为电子层。当发生化学反应时，电子倾向于使最外层充满电子，以趋于达到相对稳定的结构
思考问题二，周期是不是就代表电子层数
1，是的，元素周期表的每一行就是一个周期，第几行就代表其原子有几层电子
2，每一列就是每一族，每一族元素的电子，最外层电子数相同。
#元素周期表解读 #化学学习神器 #同位素的秘密 #质子电子中子的区别 #化学元素周期律

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