So, anything on the left side of the equation is called a reactant, and anything on the right side of the equation is called a product.

在方程的左边的,都称为反应物，在方程右边的,都称为产物。

麻省理工公开课 - 固态化学导论课程节选

And we haven't talked about reactions at all yet, so you don't need to worry about the specifics of that exactly, but just that if you have this negative change in energy, you have a more stable product than you do reactant.

当然我们还没有开始讨论反应，所以你不用担心它的细节是怎么样的，你只需要知道，如果能量的变化是负值，那么你将得到一个比反应物更稳定的生成物。

麻省理工公开课 - 化学原理课程节选

All right, so it looks like we weren't showing the percentages here, but it looks like hopefully most of you were able to get the correct answer of H2 being the limiting reactant.

看来我们好像没办法,显示结果的比例，但看起来大部分人,都能得到正确的结果,那就是H2是受限制的反应物2,看来现在我们还没搞明白。

麻省理工公开课 - 化学原理课程节选

So what we'll end up with is boron plus, 1 s 2 2 s 2 1 s 2, 2 s 2, E and what we say is the delta energy or the change in energy as the same thing as saying the energy of the products minus the energy of our reactant here, that's how much energy we have to put into the system to eject an electron.

所以结果应该是正一价的硼，电子排布为，我们说，Δ,也就是，E，的变化量,等于生成物的能量,减去反应物的能量，这就是我们从这个系统中,打出一个电子所需要的能量。

麻省理工公开课 - 化学原理课程节选