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So let's figure out the bond order for our two molecules here that we figured out the electron configuration for.
让我们看看这里,两个分子的键序是多少。
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So what we can actually directly compare is the dissociation energy or the bond strength of nitrogen versus hydrogen.
因此实际上我们可以直接进行比较,对氮分子与氢分子的离解能,或键的强度。
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And you would find that the bond energy of the heteronuclear molecule was nowhere on the average of the two.
你将发现,电子相同的分子的总能量,并不是平分的。
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Many kinds of molecules make up your coffee There are the water molecules, the flavor molecules the milk proteins, etcetera.
许多不同种类的分子构成了你的咖啡,有水分子，气味分子，牛奶蛋白等等。
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The name of the molecule isn't important, but it's a molecule that stimulates the heart to produce new blood vessels around it.
这种分子的名字无关紧要,但要知道它能刺激,在病变血管周围生成新血管
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The idea is that these positions are left wing positions and these positions are right wing positions.
最靠近这里的立场代表左翼分子的立场,而这边则是右翼分子的立场
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It's--even it's still your body as you eat dinner and so now some molecules have been absolved into your body that weren't there before.
即使你吃了饭,你的肉体吸收了,之前没有的分子,它还是你原来的肉体。
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In contrast, the dissociation energy of a bond for hydrogen, and molecular hydrogen is everywhere around us, we see 432 kilojoules per mole.
相反，氢分子在我们周围到处都是，一个氢分子的离解能，是432千焦每摩尔。
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If you were to make that change you would find that the molecule now has completely different biological and chemical properties.
如果要做出这样的变化,你会发现,分子的生物形状,和化学性质完全改变了。
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we know that h is always terminal, right after the molecule that it's attached to.
我们知道氢原子永远都在末端，放到和它成键的分子的后面。
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That is going to equal the energy of the electrons in H2 minus the energies of the electrons in H.
这等于H2分子的能量2,减去H原子中电子的能量。
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If I have one that's 400 kilojoules per mole and another that's 200 kilojoules per mole and I blend them, how do I get 500 kilojoules per mole?
如果你有一个每摩尔400千焦的分子,和一个没摩尔200千焦的分子,我把它们并子一起，我怎么得到每摩尔500千焦的键？
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The signal comes in the form of molecules which we're going to call throughout the lecture here 'ligands'.
信号通常以分子的形式来传递,在这门课里我们把这种分子叫做配体
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Higher entropy basically because you're forming molecules of gas where there weren't any before, and there's more disorder in the gas phase than in the liquid. That is, the gas phase molecules have more freedom to roam.
高的熵是因为,我们产生了以前不存在的气体分子,气体的无序程度比液体大，换句话说,气相的分子，有更多的到处游荡的自由度。
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The center of excess negative charge on all of the dipoles is at the very center of the molecule.
多出来的键,的负电荷中心都集中在,分子的正中间。
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However, on Friday we will use a different approach so we can talkabout bonding within atoms that have more than two atoms, molecules with more than two atoms.
但是，在周五我们,会用一种新的办法来讨论,不止两个原子的分子的成键。
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So, let's compare this to the energy of the h 2 molecule, and we find that that's negative 3,048 kilojoules per mole.
那么，让我们将它与氢分子的能量比一比，我们发现氢分子的能量是负的，3048，千焦每摩尔。
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So, we need a new kind of mechanics, which is quantum mechanics, which will accurately explain the behavior of molecules on this small scale.
所以我们需要一种新的力学，也就是量子力学,来解释在这个,小尺度下分子的行为。
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But now we're talking not about an atomic wave function, we're talking about a molecular wave function.
但现在我们不是讨论原子的波函数，我们讨论的是分子的波函数。
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So, how do we figure out first how to draw the skeletal structure of this molecule here?
那么，我们如何来解决它,首先是如何画出这个分子的骨架结构？
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Then we're going to actually use MO theory to describe bonding within these molecules, and we'll start with homonuclear diatomic molecules.
然后我们要利用MO理论,来描述这些分子内的成键，我们要讨论同核双原子分子。
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So you can imagine it's just going to get more and more complicated as we get to other types of atoms, and of course, molecules from there.
所以你们可以想到,当我们处理其他类型的原子,以及分子的时候，它会变得越来越复杂。
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They have two fatty acid chains and so these are the oily like parts of the molecule, the molecules that behave like oil.
它们含有两条脂肪酸链,这是部分分子具有油脂的属性,使磷脂分子具有油脂的属性
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What happens in the intestine is that food gets broken down into constituent molecules, some of those molecules are absorbed into our bodies.
在肠道中,食物必须分解成基本的组成分子,其中一些分子才能被我们的身体吸收
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So this means we can actually calculate this for any molecule that we've drawn the Lewis structure for, because we actually do need to draw the Lewis structure before we know, for example, how many of each of these we have, or at least go through the rules.
这意味着我们可以将原来画过,路易斯结构的分子的形式电荷计算出来，因为我们其实在画出,路易斯结构之后才能知道，比如，这些量的值是多少，或者至少我们需要经过前面的那些步骤。
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Molecules are produced here and they flow directly over, usually by diffusion, to the neighboring molecule.
这里产生的分子,通常是以扩散的方式,直接到达临近的分子
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It's a long word that just means other chemistry that happens on the molecule after translation.
翻译后修饰意味着,在翻译之后对于产物分子的其他化学修饰
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Then at the end, we'll look at an example with a heteronuclear diatomic molecules.
在最后，我们会看一个,异核双原子分子的例子。
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And where we had left off was we were going to start one example of thinking about now where we have a heteronuclear diatomic molecules, so two different atoms in terms of forming the molecule.
我们还剩下一个,异核双原子分子的例子没讲,这里组成分子的原子，是不同的。
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Because the molecules are farther apart from each other. So the energy goes up.
因为分子间的距离,扩大了。
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