来自《耶鲁大学开放课程：新生有机化学 第3集 第3集》

• 
  
  sometimes you get three inside eight,
  有时候会是中间三外面八的形状
• 
  
  sometimes you get two inside nine, for that number.
  有时候却是中间二外面九
• 
  
  Okay, and then you can get four inside nine,
  接下来是内四外九
• 
  
  our inside ten, five inside ten,
  内四外十 内五外十
• 
  
  and then after five, if you put in more,
  如果中间的磁针数超过五 再继续增加
• 
  
  if you put in sixteen, you get one inside five inside ten.
  十六枚磁针得到的是个十包五包一的图像
• 
  
  What is this reminding you of? Yes?
  看到它你想到了什么呢
• 
  
  Of orbitals.
  轨道
• 
  
  The shell structure of atoms. Right?
  原子的壳状结构
• 
  
  As you go down the periodic table you complete a shell.
  顺着周期表你能得到完整的原子壳状结构
• 
  
  So it's a model of shells,
  所以这是一个外壳的模型
• 
  
  and then you can get more and more and more.
  再往下走 就能得到更多层的壳