The Okefenokee,which is already nearly choked with plants, would probably fill in,dry up, and become just another cypress and pine forest were it not for range fires that come along every once in awhile and burn out decayed vegetation.
VOA: standard.2010.03.29
So, in order to fill up our shell, what we need is 3 times 8 or 24 electrons.
因此,为了填满所有的壳层,我们需要三乘以八也就是二十四个电子。
And which ones you can put in. How to fill up that bin. Very important in shipping.
还有置放的种类,如何填满这个箱子呢?,这在运输中是个很重要的问题。
I want to back up now because I think it's important to fill in a little bit of the historical context behind that long but important prose treatise.
我想要退回去往前看是因为我认为,补充一些历史背景对于,解读那篇冗长却又很关键的政论是很重要的。
So the Hund's Rule is telling us to put the two electrons in separate orbitals unpaired as opposed to we should not put them in like this, like some librarian might want to fill nicely from left to right, up and down.
所以洪特定律告诉我们,要把这两个电子放在独立的轨道中,而不是像我们常做的那样,像一些图书管理员想要,把书从左到右,从上到下放得很好。
Cereal would be--a serving of cereal would be about the amount that would fit in a wine glass, but people think that you fill up a bowl and that becomes a serving, but a typical amount of cereal that people serve themselves might be two or three times what the ordinary size is.
这是一餐份量的麦片,放在酒杯里大概那么多,但人们认为满满一碗才是一份,人们通常所食用的麦片,是原来大小的二到三倍
Remember we have to put one in each degenerate orbital before we double up on any orbital, so just keep that rule in mind that we would fill one in each p orbital before we a to the second one.
我们必须把,每一个放入简并的轨道,我们把每一个电子放在p轨道里,所以把规则记在脑子里,我们把每一个电子放在p轨道里,在我们放入第二个电子之前。
Now, these Th-cells, helper T-cells, go on to stimulate B-cells, and it's these B-cells that become the mature antibody producing cells that make quantities of antibody that fill up in your body.
这些辅助性T细胞,进一步刺激B淋巴细胞,从而使这些B淋巴细胞,逐渐发育成成熟的抗体生成细胞,可在体内产生大量抗体
So that doesn't make a difference for us when we're talking about neutral atoms, 4s because we would fill up the 4 s first, because that's lower in energy until we fill it, and then we just keep going with the d orbitals.
所以那对我们来说没什么不同,所以当我们讨论中性原子时,因为我们会首先填充,因为在我们填充它之前它的能量都较低,然后我们继续填充d轨道。
s Then we go up to the 2 s, and we have two electrons that we can fill in the 2 s.
然后我们上升至,我们有两个电子,可以填充至2s选择。
And now we get the p orbitals, remember we want to fill up 1 orbital at a time before we double up, so we'll put one in the 2 p x, then one in the 2 p z, and then one in the 2 p y.
我们到了p轨道,记住在双倍填充之前,我们想要每次填充至一个轨道,所以我们在2px填充一个然后2pz填充一个,然后2py填充一个。
s But it just turns out that the 4 s is so low in energy that it actually surpasses the 3 d, because we know the 3 d is going to be pretty high in terms of the three shell, and the 4 s is going to be the lowest interms of the 4 shell, and it turns out that we need to fill up the 4 s 4s before we fill in the 3 d.
但是结果是,能量较低,4s是第四层最低的,因为我们知道3d在第三层,是非常高的,4s是第四层,最低的,结果是我们在填充3d之前,需要先填充。
So we have two electrons in our bonding orbital, but because we use the same rules to fill up molecular orbitals as we do atomic orbitals, so the Pauli exclusion principle tells us we can't have more than two electrons per orbital, so we have to go up to our anti-bonding orbital here.
所以在成键轨道上有两个电子,但因为我们用了和原子轨道时,用的相同的规则,所以Pauli不相容原理告诉我们,一个轨道上不能有两个以上的电子,所以我们需要填充到反键轨道上去。
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