Does that explain why it was missing in the periodic table?
这能解释为什么它在元素周期表中缺失了吗？
Early versions of the periodic table had gaps, missing elements.
早期的元素周期表有空缺，缺少一些元素。
Professor Harrison, were you saying that the periodic table is predictive?
哈里森教授，你是在说周期表是可以预测的吗？
Of course, it was an element the periodic table let us to expect existed before anyone had found it or made it.
当然，它在被人发现或制造前，就是一种元素周期表使得我们期待其存在的元素。
For example, tellurium comes before iodine in the periodic table, even though its atomic mass is slightly greater.
例如在元素周期表中，碲排在碘之前，尽管它的原子质量略大一些。
In fact, subsequent work has shown that in a periodic table, elements should not be ordered strictly by atomic mass.
事实上，后来的研究已经证明，在元素周期表中，元素不应该严格按照原子质量来排序。
They're black with colored elements of the periodic table.
它们是黑色的,中间还有些元素周期表上的彩色元素。
As an example, consider the periodic table expressed in XML.
比如，考虑一下用XML表示的元素周期表。
She gave him a miniature copy of the periodic table of elements.
她给了奥巴马一个元素周期表的微型复制品。
And I put a periodic table up there, just the part you might need to look at.
我在上面放了一张周期表，只放了可能要用到的一部分。
It is on the periodic table of elements under the symbol Bi at atomic number 83.
在元素周期表里序列号是83，标志是BI。
So as we go across the row, and this is my beautiful picture of a periodic table here.
那么当我们沿着行向右走的时候，这是我漂亮的元素周期表。
We need to add something else in order to explain what is going on in the Periodic Table.
我们需要引其他一些东西进来才能解释清楚，元素周期表中发生的这种现象。
Alchemy, or transmutation, has placed new elements on the periodic table, including plutonium.
炼金术，或嬗变，已经在元素周期表中增加了新元素，包括钚。
Suppose you want to format this code as a typical cell of a periodic table, as Figure 1 shows.
假设要将这段代码格式化成周期表中的典型单元格，如图1所示。
The chemistry of the Earth was out of kilter, wholly unbalanced by the periodic table, and alive.
以化学元素表来衡量，地球的化学性质是不正常的，完全失去了平衡，却充满活力。
By looking at the periodic table it's right underneath oxygen, so those both have 6 valence electrons.
通过查周期表可以看到它就在氧的正下方，因此它们两个都有六个价电子。
If you click on Courseware you will get to this menu, the first of which preferences is Periodic Table.
如果你点击课件，就会来到这个菜单，第一个选择就是周期表。
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。
Lithium is the third-lightest element on the periodic table, which allows for far greater energy density.
锂是元素周期表第三“轻”的元素，这使得锂具备更高的能量密度。
AS WELL as being close to each other on the periodic table, copper, nickel and zinc share several traits.
铜（29），镍（28），锌（30）在化学周期元素表中紧挨着彼此，并且它们还拥有一些相同的特性。
Mironov may be my favorite mad scientist since the chemist who had the periodic table engraved on one of his hairs.
自一位在自己一根头发上刻下元素周期表的化学家之后，米罗·诺夫是我最喜欢的疯狂科学家。
Arsenic sits right beneath phosphorus in the periodic table of the elements and shares many of its chemical properties.
在元素周期表中，砷就位于磷的下面，二者具有很多相同的化学性质。
So, remember when you're looking at your periodic table, don't forget about the lanthanides, sometimes they come into play.
因此，要记住，当你在看元素周期表时，不要忘了镧系元素，有时候也会用到它们。
"In case you're ever in a bind and need to calculate a molecular weight, here's a periodic table for your wallet," she told him.
还对他说：“这是个元素周期表，你可以放到钱包里，以防需要计算分子质量，你又想不起来的尴尬场面。”
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。
Anyway, if you go to your Periodic Table you will find that on the one side you can get what is called the enthalpy of atomization.
如果你看元素周期表，你会在这一侧发现，这是原子化焓。
The next heaviest element in the periodic table, the inert gas helium, is used for detecting cracks in pressure vessels and the like.
而在周期表里此行最重的元素，惰性气体氦，用于压力舱那类东西的小裂缝。
The next heaviest element in the periodic table, the inert gas helium, is used for detecting cracks in pressure vessels and the like.
而在周期表里此行最重的元素，惰性气体氦，用于压力舱那类东西的小裂缝。
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