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254 So, basically all we did was take 12 54, 22 subtract 12 32, and we got 22 electron volts.
基本上我们所要做的全部也就是用，减去，1232，这样就得到了。
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OK, elements with low average valence electron energy, and here I'm saying below 11 electron volts, these are good electron donors.
平均价电子能都较低的元素，我是指那些低于11电子伏的，这些是很好的电子给体。
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And let's look at the final kinetic energy that we'd observe in this spectrum, which is 384 electron volts, so what is that third corresponding ionization energy?
然后让我们来看一下,在光谱中观测到的，最后一种动能，它大小是，384，电子伏，那么这相应的第三种电离能是多大？
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Its average valence electron energy is 5.2 electron volts, which is a heck of a lot less than 11.
它的平均价电子能是,5。2电子伏，那比11电子伏要少得多。
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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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Also to point out, a lot of times you'll see electron volts instead of joules, this is the conversion factor here just so you all have it in your notes.
同样也要指出，很多情况下你会看到,电子伏特而不是焦耳，这里是换算因子,你们在讲义上都能找到。
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These are photodetectors, band gap two electron volts, respond to visible light.
这是光电探测器，能带隙为2电子伏，当它反应于可见光。
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If you multiply entry 23, which is 13.6 electron volts I will show you what the electron volt is in a few minutes. We will just put it up here prematurely. But that is given in your chart.
如果乘上第23个常量，代表13。6电子伏,接下来我就会向你们说明什么是电子伏,我们先提前把它提出来,但那只是放在你们的图表中。
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And it turns out that the first kinetic energy that we would see or the highest kinetic energy, would be 12 32 electron volts.
结果是我们最先观测到的动能,也就是最大的动能，将是，1232，电子伏，那。
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So I am going to go and I am going to look for something that has an energy of 13.6 electron volts holding it in place, and I am going to use a flashlight with 12,400 electron volts.
所以我将去,找一些东西,有13。6电子伏特的东西,将它固定在某个地方,我要利用12。400电子伏特的电子源。
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And then the conversion of joules to electron volts is entry 42. If you multiply those two together you will end up with this quantity.
然后焦耳和电子伏的转换,是在第42个常量，如果你把这两个放一起,你将得到这个数值。
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I couldn't quite hear, but I have a feeling everyone said 870 electron volts.
虽然我听不太清，但是我感觉大家回答的都是，870，电子伏。
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The first ionization energy of lithium is about 5.4 electron volts per atom.
锂的一级电离能,大约是每原子5。4电子伏。
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0eV This is almost 20 eV, high average valence electron energy, greater than 13 electron volts.
它的价电子能是，这是很高的价电子能，比13电子伏要高。
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Or, in my favorite unit, 19.80 electron volts.
或者用我最喜欢的单位，就是19。80电子伏特。
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This will be 13.6 over 100 electron volts.
这相当于13。6倍的100电子伏特。
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If I take lambda equals one angstrom, hc/lambda go through hc over lambda, you will discover that the energy of a photon with one angstrom as its wavelength is on the order of 12,400 electron volts.
如果我让波长等于一埃，能量为，你将发现光子的能量,当其波长为1埃的时候,相当于12，400电子伏特。
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Good, quick math. All right, so 48 electron volts.
很好，算得真快，48，电子伏。
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It is up around 13, 14, 15 electron volts.
它最高大约为13，14，15电子伏特。
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You know it is about two to three electron volts.
你知道他们大约为2-3伏。
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It is 13.6 electron volts.
它有13。6电子伏特。
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This is electron volts per atom.
这是每个原子所具有的电子伏特。
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