Atoms use electrons like arms to reach out and hold their neighbors.

原子像手臂一样使用电子来伸出并抓住它们的邻居。

And we know that this bond consists of two electrons, like that.

我们知道这个键由两个电子组成，就像那样。

Hydrogen in that first shell just wants to get to two valence electrons like helium has.

第一个壳层中的氢只想像氦一样获得两个价电子。

And when we cover quantum mechanics we'll learn why this doesn't work, what are the contradictions that emerge when you try to model an electron like a planet going around the Sun.

当我们介绍量子力学时，我们将了解为什么这行不通，当您尝试将电子建模为围绕太阳运行的行星时会出现哪些矛盾。