The minerals calcium and sulfur were at the bottom of the ocean.
VOA: special.2010.01.04
OK, so now we've got, taken an electron from that sulfur, put it here, an electron from that sulfur, put it here.
现在我们得到的是,从硫那儿得到一个电子,放在这儿,一来自于硫的电子,放在这儿。
times 7, plus we have 6 in the sulfur, and oxygen is right above sulfur, so that also has 6.
二乘上七,加上硫的六个,而氧在硫的正上方,因此也有六个。
The calcium and sulfur remained. The minerals formed gypsum rock.
VOA: special.2010.01.04
2 3 Well, son of a gun, one, two, three, four, five, six, sulfur, We've got six. We've used all the electrons.
真见鬼,4,5,6,硫,共六个,我们已经用掉了所有的电子。
WMO scientists assess and monitor air pollutants such as ground-level ozone,smog, particulate matter, sulfur dioxide and carbon monoxide.
VOA: standard.2009.03.23
So why don't you tell me what the formal charge should be on the sulfur atom of thionyl chloride?
那么请大家来告诉我亚硫酰氯中,的硫原子应该有多少形式电荷?
In Mr.Chavez's last speech here in 2006, he referred to President George W.Bush as the devil, saying he smelled sulfur in the room.
VOA: standard.2009.09.24
So, if we compare the sulfur to the oxygen, the oxygen it turns out is more electronegative and that is what holds the negative charge in this molecule.
因此,如果我们来比一下硫和氧,氧应该有更高的电负性,而在这个分子中它确实有负的电荷。
"It does not smell of sulfur in here anymore, it doesn't smell of sulfur.
VOA: standard.2009.09.24
It could be aluminum, silicone, phosphorous, sulfur, c hlorine or argon.
答案可能是铝,硅,磷,硫,氯或者氩。
So between b e, and b, between n and o, magnesium and aluminum, and then phosphorous and sulfur, what we see here is that we're kind of going down, or quite specifically, we are going down.
比如从铍到硼,从氮到氧,从镁到铝,从磷到硫,我们在这些地方看到有点下降,或者可以明确地说,我们确实在下降。
090 We have 1,090 for carbon, 1000 1,000 for sulfur, 1400 and 1,400 for nitrogen.
碳的是,硫的是,而氮的是。
And then we end up having 6 shared electrons, 2 from each of the bonds, so we end up with a formal charge on sulfur of plus 1.
然后我们有六个共用电子,每个键两个,因此最终硫的形式电荷量为正一。
All right. So, let's go ahead and draw our Lewis structure here with sulfur in the middle.
好,那么,让我们来把我们的,路易斯结构画在这,硫在中间。
For the sulfur, we start off with 6 valence electrons, minus 4 lone pair electrons, minus 2, taking in account our bonding electrons, so we end up with a formal charge of 0.
对于硫,我们从六个价电子开始,减去四个孤对电子,再减去二,算上我们的成键电子,因此最终我们有零个形式电荷。
We would expect the ionization energy to decrease, that means that sulfur has our lowest ionization energy.
我们预期电离能会降低,这就意味着硫的电离能最低。
He said look at sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, potassium.
他说,看,钠,镁,铝,硅,磷,硫磺,氯,钾。
So, we can put our sulfur in the middle, and then it doesn't really matter how we draw the rest of it, where we put our c l's versus where we put our oxygen.
那么,我们可以把硫放在中间,然后把其它的原子画在哪里就不重要了,把两个氯原子与一个氧原子放在哪里都行。
So if we look at sulfur, what we need to do is take the valence electrons in sulfur, and there are 6.
因此如果我们来看硫原子的话,我们需要做的是,将硫的价电子,有六个。
And what we have left here is the sulfur, which will also get a pair.
剩下的是硫,它也应该得到一对。
So in one case, we could actually put carbon in the middle, in one place, we could put sulfur in the middle, and in one case we could put nitrogen.
那么有一种情况是,我们把碳放在中间,还有一种情况是,把硫放在中间,另外一种情况是把氮放在中间。
But, the oxygen has taken two electrons from the sulfur.
但是,氧从硫那里得到了2个电子。
And, this is all that was known at that time, seven metals, carbon, and sulfur.
这是当时所知道的了,7种金属,碳,和硫磺。
So, in terms of ionization energy, we would expect to see sulfur in the middle.
因此,按照电离能,我们应该把硫放在中间。
We started with just the seven metals and carbon plus sulfur, it was the point of departure for Democritus.
我们开始讲了7种金属,还有碳和硫磺,那就是Democritus的起点。
So, a lot of people I hear are saying sulfur, and that's right.
我听到很多人说的是硫,这是正确的。
Well, this chlorine has taken one electron from the sulfur.
对了,这个氯从硫那里得到了一个电子。
And what you find out if you do these calculations, is that you have a negative 1 for your formal charge on nitrogen, you have a negative 2 for your formal charge on carbon, and you have a positive 2 for your formal charge on sulfur.
而如果你做了这些计算会发现,氮的形式电荷量为负一,碳的形式电荷量为负二,而硫的形式电荷量为正二。
We'll just put them in some way around our sulfur atom.
我们只要随便把它们放在硫原子周围就行了。
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