Number four, electron affinity.
数字4，电子亲和力。
So this reaction is called electron affinity.
整个这个反应称为电子亲合。
Electron affinity, however, can be either negative or it can be positive.
但是，电子亲和能既可以是负的，也可以是正的。
So let's talk about another periodic trend, this one is called electron affinity.
那么下面我们来讨论一下另一个周期性规律，它被称作电子亲和能。
To answer this question you just really want to think about what does electron affinity means.
要想答对这个问题，你只需要好好想一想，电子亲和能的真正意义。
So this means nitrogen has low electron affinity, it doesn't actually want to gain an electron.
这意味着氮的电子亲和能很低，它实际上并不愿意得到一个电子。
This paper proposed the quantitative relationship between electron affinity and induced effect.
本文提出了电子亲合力与诱导效应之间的定量关系。
So most of you recognize, if we switch back to the notes, that they do have a negative electron affinity.
看来大部人都想到了，如果你翻翻讲义的话，它们的电子亲和能确实是负的。
Electron affinity is actually the ability of an atom, or we could also talk about an ion to gain electrons.
电子亲和能其实就是一个原子，或者我们也可以讨论离子获取电子的能力。
So do you think noble gases would have a high positive electron affinity, a low positive, or negative electron affinity?
那么，你认为稀有气体的电子亲和能，应该是一个高的正值，一个低的正值，还是一个负值？
So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.
比如，以氯为例，我们可以说氯的电子亲和能，应该等于正的，349，千焦每摩尔。
The formation of negative ions from these elements is difficult dut to electron affinity of these negative ions is near to or less than zero.
这些负离子对应元素的电子亲合势大部分接近或小于零，负离子难以形成。
So this is not going to be a favorable process, we're going to find that the electron affinity is actually a negative 7 kilojoules per mole for nitrogen.
因此这并不是一个容易发生的过程，我们会发现氮的电子亲和能，应该是负的，7，千焦每摩尔。
One major difference between electron affinity and ionization energy is that when we talked about ionization energy, remember ionization energy always has to be positive.
电子亲和能，与电离能之间最大的不同就在于，当我们提到电离能的时候，记得电离能总是正的。
With the merits of high hardness, high thermal conduction, negative electron affinity, diamond is deemed one of the preferred materials of the field emission cathode.
金刚石因具有高硬度、高热导率、负电子亲和势等优点而成为场发射阴极的首选材料之一。
The influence of electron affinity of nitrofluorenone derivatives, ionization potential of aliphatic amines and ste-ic hindrance on their interreactions have been discussed.
讨论了芴酮衍生物的电子亲合势、脂肪胺的电离势及其空间位阻对相互作用的影响。
We talked about ionization energy, electron affinity, we talked about electronegativity, which is just kind of a combination of the first two, and then ended with atomic radius here.
我们讲了电离能的，电子亲和能的，还讲了电负性的，也就是前两个的组合，最后讲了原子半径的。
We'll then take a turn to talking about the periodic table, we'll look at a bunch of periodic trends, including ionization energy, electron affinity, electronegativity and atomic radius.
然后我们再开始讲元素周期表，我们会看到很多周期性规律，比如电离能，电子亲和能，电负性以及原子半径。
Structural features, binding energies, vertical ionization potentials, vertical electron affinity, charge transfers, and binding characters were evaluated for each au-ni binary cluster.
详细地分析了团簇的结构特征，平均结合能，垂直电离势，垂直电子亲和能，电荷转移以及成键特征。
So it's the affinity it has for electrons, it's how much it likes to get an electron.
因此，它表示的是对电子的亲和力，即有多么希望得到一个电子。
Cytochrome oxidase is the marking enzyme on electron transporting respiratory chain of mitochondria, with high affinity on oxygen and can make the respiratory chain react with maximal velocity.
细胞色素氧化酶是线粒体电子传递呼吸链上的标志酶，对氧有高度亲和力，能够使呼吸链以最大速度发挥作用。
Cytochrome oxidase is the marking enzyme on electron transporting respiratory chain of mitochondria, with high affinity on oxygen and can make the respiratory chain react with maximal velocity.
细胞色素氧化酶是线粒体电子传递呼吸链上的标志酶，对氧有高度亲和力，能够使呼吸链以最大速度发挥作用。
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