In terms of where different atoms are in a molecule, if you have a hydrogen atom or a fluorine atom, you can pretty much guarantee they're always going to be terminal atoms.

对于不同原子在分子中的位置，如果你有一个氢原子或者一个氟原子，那你基本可以保证,它们总是最末端的原子。

麻省理工公开课 - 化学原理课程节选

One thing that I want to mention that is really important is once you have double bonds, what happens between those two atoms in the molecule is they can no longer rotate in relation to each other.

我要提醒你们的非常重要的一点事,一旦有了双键，分子中的两个原子,就不能相对旋转了。

麻省理工公开课 - 化学原理课程节选

And what's important to keep in mind about formal charge is if we have a neutral atom, such as we did in thionyl chloride here, the sum of the individual formal charges on individual atoms within the molecule have to equal 0.

而关于形式电荷记住一点是很重要的,那就是如果我们有一个中性原子，比如亚硫酰氯，那么这个分子中的所有原子的,形式电荷之和应该等于零。

麻省理工公开课 - 化学原理课程节选

So, essentially drawing how the atoms are arranged within our molecule.

本质上也就是画出,分子中的原子是如何排列的。

麻省理工公开课 - 化学原理课程节选

So remember, that when we talked about Lewis structure, the organizing principle behind Lewis structures is the idea that within the molecule the atoms are going to arrange their valence electrons, such that each atom within the molecule has a complete octet or full outer shell.

记得，当我们讨论路易斯结构的时候，路易斯结构所遵循的组织原则是这样一种思路,那就是分子中的原子都倾向于,重新安排它们的价电子,使得分子有一个完整的,“八隅体“或者排满的外壳层。

麻省理工公开课 - 化学原理课程节选

And what I'll mention to you just in terms of the fact that -- we're finally dealing with real molecules, which is -- or molecules that are made up of more than one atom, which is kind of exciting for me and maybe for some other of you that like to move into thinking about what some of the consequences of these molecules reacting might be.

而我将要告诉大家的是,我们终于开始与真正的分子打交道了，或者说由多于一个原子所组成的分子，这让我和你们中的某些人感到有些兴奋,因为我们更喜欢思考这些分子,经过反应之后可能出现的一些结果。

麻省理工公开课 - 化学原理课程节选