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if we think about electronegativity as a periodic trend we can just draw our nice periodic table here, and let's separate it into quadrants.
如果我们来思考一下电负性的周期性规律,我们可以把我们漂亮的周期表画在这，然后把它分成四个象限。
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5% And, it turns out that about 75% of the periodic table falls into this category.
而且，它表明元素周期表的,都属于这个种类。
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So you should be able to look at your periodic table and see this, or also I've written the trend here.
大家应该能够通过查周期表，或者通过看我写在这里的趋势看出来。
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sort of takes the cyclicality out of earnings and you can see over history how that multiple has varied.
一定程度上在收益上避免了周期性的,而且你可以看到随着历史的进程,这个倍数发生了多大的变化。
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Here is as pacemaker and this pacemaker does the same thing that a heart pacemaker does, it generates periodic electrical signals.
它和心脏起搏器发挥的作用相似,发出周期性的电信号
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Relative to the whole market, It's well known that over periods of multiple decades the market has a tendency to go up.
是和整个市场相关的对吗，我们都知道经过几十年的时间周期,市场会有上涨的倾向。
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You've got to ask yourself, let the time it takes to do a full circle, that's the time period, do a full circle.
你已经问你自己了,留足够的时间让它运动一整圈,那就是运动整个圆周的时间周期
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Your choice will depend on where you are in the menstrual cycle.
你的选择将取决于,月经周期时你在哪里。
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You are allowed to use on the test the official version of the Periodic Table of the Elements which most of you should have by now.
在测试中你们可以使用,化学元素周期表的官方版本,你们应该大部分都有了吧。
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If you look on the Periodic Table this is 598 atomic hydrogen. And, sure enough, there is 13.598, which is this number here in electron volts.
如果你查找元素周期表上的氢原子,毫无疑问，它的电离能就是13。,这个数值也是电子伏的值。
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So hopefully, it was a time issue in terms of looking at the periodic table, because let's have you tell me what are we looking for here?
希望刚才大家出问题的原因,是因为看周期表有时间限制，请大家告诉我,我们在这里找什么？
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We have a table of the elements with properties varying periodically with atomic mass, so we compress all of that information and refer to it as the Periodic Table.
我们有一个元素表，其中的元素的特性,随着原子质量的改变而引起周期性的变化，所以我们将所有的信息精简,将它变成一个周期表。
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It is just down the hall from this lecture theater. And you bring the Periodic Table and the Table of Constants and a calculator and something to write with.
就在这件教室下面的大厅那,你们带上元素周期表和常数表,还有一个计算器和一些写的东西。
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Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.
细胞生命期可以停止在细胞周期的某个点,并保持很长时间
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And there's a lot we can explain by talking about what we see in the periodic table in terms of what different trends are in grouping different elements in different spots within the periodic table.
我们可以解释很多,通过讨论元素,周期表中的内容,按照各种不同的规律,将周期表中不同位置的元素分组归类。
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And I don't actually know the periodic table entry for raisins. So I'll have to write it out.
我不知道葡萄干的周期表条目是什么,所以现在我要把它写出来。
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I don't think the housing industry, in general,is a good place to be because of its, sometimes,violent cyclicality.
我认为总的来说住房工业,不是一个好的投资品种,因为它时常有着强烈的周期性
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Finally, getting it right to keep inflation low, keep that boom-bust cycle from coming back like it did, and you don't have to go, even go back so far period.
最终可以维持低通胀，打破繁荣与萧条的周期循环，这个已有先例，远的不说。
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Most of you have probably at some point or another learned about the cell cycle, or the process of a cell going from being a single cell to being two cells.
大部分人应该或多或少,学过细胞周期,就是细胞,一分为二的过程
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And in contrast, in the lower left hand part of the periodic table, these 2 quantities are low, so also what we're going to see is low electronegativity.
相反地，在周期表的左下部分，这两个量的值都很小，因此我们会看到这里的电负性也很低。
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So, that's actually the electron configuration we have when we're talking about copper and some other exceptions in the periodic table that you're going to be looking at.
因此，这才是铜原子真正的电子排布,而且我们在元素周期表中,会看到与铜原子类似的,其他例外的情况。
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We know that ionization energy is going to increase as we go across the periodic table, so that means carbon has a lower ionization energy than nitrogen which is right next to us.
我们知道电离能会随着周期表,向右而逐渐变大，因此碳的电离能比旁边的氮要低一些,那么就像我说的。
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You can see that as you fill up your periodic table, it's very clear. But also we'll tell you a pneumonic device to keep that in mind, so you always remember and get the orbital energy straight.
在你们填周期表的时候，非常清楚但是我们也要告诉你们,一个策略去记住它，所以你们总是记得,并得到连续的轨道能量。
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So this, in fact, is going to be our last principle that we're going to talk about in terms of periodic trends.
实际上，这将是,我们要讨论的最后一个,周期性规律。
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And what we can do is we can also use the Schrodinger equation to make these accurate predictions for any other atom that we want to talk about in the periodic table.
我们能做的是,我们可以使用,薛定谔方程去做一些,关于我们想要讨论的元素周期表,中任何一个原子的预测。
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If you flip the Periodic Table over you will have the ionization energy of sodium, first ionization energy, 5eV and it is about 5 eV which, when you convert, 496kJ/mol is a whopping 496 kilojoules per mole.
如果浏览周期表,你可以得到钠的离子化能，第一电离能，大约，当你转换的时候，是巨大的。
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So if you flip the info page over on the back here, what you'll see is the periodic table, this is the same one that I've handed out in the last two lectures - the periodic table without any electron configurations.
将这张纸翻过来，你可以看到一个元素周期表，这与我们前两次课发过的,是一样的,-没有任何电子排布的周期表。
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