• I would ask you to see how such energy level diagrams rationalize what we know to be true.

    我想问你,看看这种能级图,如何证实我们知道的是正确的。

    麻省理工公开课 - 固态化学导论课程节选

  • And what you can see directly from looking at this energy level diagram, is that the molecule that we have is now more stable in the individual atoms.

    你从直接看,能级图中会发现,分子比单个的,原子能量更低。

    麻省理工公开课 - 化学原理课程节选

  • This energy level diagram helps us understand the relationship between electron filling and bond strength.

    能级图能帮助我们,理解电子填充,和键强的关系。

    麻省理工公开课 - 固态化学导论课程节选

  • At this point, we have no other choice but to double up before going to the next energy level, 2px so we'll put a second one in the 2 p x.

    在这点上我们没有其他选择,而只有双倍填充,在到下一个能级之前,所以我们放入第二个电子至。

    麻省理工公开课 - 化学原理课程节选

  • I would say with the aid of an energy level diagram explain the fact that helium is found as atomic gas and not molecular. How about this one?

    我要说的是,在能级图的帮助下,可以解释氦气是单原子气体,而不是分子气体这一事实,那么这个呢?

    麻省理工公开课 - 固态化学导论课程节选

  • And so we are going to use that in order to construct some energy level diagrams.

    我们就准备使用它,来建立一些能级图。

    麻省理工公开课 - 固态化学导论课程节选

  • And I am going to put up this energy level diagram again.

    我准备再次贴起,这个能级图。

    麻省理工公开课 - 固态化学导论课程节选

  • Absorption is just the opposite of emission, so instead of starting at a high energy level and dropping down, when we absorb light we start low and we absorb energy to bring ourselves up to an n final that's higher.

    吸收就是发射的逆过程,与从一个高能量到低能量不同,当吸收光时,我们从低能量开始,吸收能量到一个更高的能量。

    麻省理工公开课 - 化学原理课程节选

  • So anything that goes from a higher energy level to 2 is going to be falling within the Balmer series, which is in the visible range of the spectrum.

    任何更高能级到2能级2,都是属于Balmer系,它在可见光谱中。

    麻省理工公开课 - 化学原理课程节选

  • And this is the energy level diagram for multi-electron atoms.

    看一下能量级图表中,多电子原子的部分。

    麻省理工公开课 - 固态化学导论课程节选

  • I want to do energy level diagrams for molecules.

    我要为分子制作能级图。

    麻省理工公开课 - 固态化学导论课程节选

  • This is what the energy level diagram looks like.

    这就是能量级图表大致的模样。

    麻省理工公开课 - 固态化学导论课程节选

  • So, our next level up that we can go is going to be the n equals 2 energy level, but we also have an l and an m value, 0 so our lowest l is going to be a there.

    所以下一个能量,是n等于2的能级,但我们还有l和m的值,所以我们最低的l等于。

    麻省理工公开课 - 化学原理课程节选

  • So that explains why they're so reactive, they're all very willing to give up that one s orbital and then drop to a lower energy level.

    这就解释了它们的化学性质为什么非常活泼,它们都很愿意失去那个,s,电子,然后降到更低的能级上去。

    麻省理工公开课 - 化学原理课程节选

  • And when you talk about n for an orbital, it's talking about the shell that shell is kind of what you picture when you think of a classical picture of an atom where you have 1 energy level, the next one is further out, the next one's further away.

    当你们谈到,某个轨道的n时,你们说的是壳层,壳层就是,你想象,一个原子,的经典图像时的场景,你有一个能级,下一个再更远的地方,再下一个又更远。

    麻省理工公开课 - 化学原理课程节选

  • So if we go to the ground state, what you see is we're at that lowest energy level, and we only have one possibility for an orbital, because when n equals 1, that's all we can do.

    如果我们在基态上,你可以看到,我们在能量最低的态上,只有一种,可能的轨道,因为n等于1,只有这种可能。

    麻省理工公开课 - 化学原理课程节选

  • This is the energy level diagram of H2.

    这是H2的能级图。

    麻省理工公开课 - 固态化学导论课程节选

  • So this is our final equation, and this is actually called the Balmer series, which was named after Balmer, and this tells us the frequency of any of the lights where we start with an electron in some higher energy level and we drop down to an n final that's equal to 2.

    把2代入到这里,所以得到1除以,这就是我们最终的方程,这叫做Balmer系,以Balmer名字命名的,它告诉我们从高能级掉到n等于2的,最终能级所发出光的频率。

    麻省理工公开课 - 化学原理课程节选

  • And instead of having the electron giving off energy as a photon, instead now the electron is going to take in energy from light and move up to that higher level.

    与电子以光子形式施放能量不同,我们现在要从光中,获得能量到一个更高的能级。

    麻省理工公开课 - 化学原理课程节选

  • That makes sense because we're losing energy, we're going to a level lower level, so we can give off that extra in the form of light. And we can actually write the equation for what we would expect the energy for the light to be.

    这很合理,因为我们在损失能量,我们要到一个更低的能级去,我们要以光的形式给出额外的能量,我们可以写下光能量的方程。

    麻省理工公开课 - 化学原理课程节选

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