All the elements in the periodic table have a different affinity for electrons.

元周期表中所有元对电子都有不同力。

On the periodic table of the elements, Sn is the symbol for what?

在元元周期表上，Sn是什么符号？

In fact, they make up most of the elements in the periodic table.

事实上，它们构成了元周期表中大部分元。

The transition metals are the metals in the middle part of the periodic table.

过渡金属元指元周期表中位于中间位置金属元。

They don't really get much more far off the periodic table than that.

它们在元周期表中确实没有处于太靠后位置。

And so your question about the periodic table is very interesting.

所以你提出关于元周期表问题非常有趣。

Chemists know all the elements on the periodic table.

化学家了解元周期表里所有元。

Let's say your chemistry teacher asks you to memorize a periodic table for example.

比如说，你化学老师让你记住一张元周期表。

You could break down each line of the periodic table into a short story.

你可以把元周期表每一行分解成一个小故事。

The race to extend the periodic table continues.

扩展元周期表比赛仍在继续。

Now we have the entire periodic table.

现在们有了整个元周期表。

“Mendeleyev’s Dream” by Paul Strathern is the best book I've ever read on the periodic table.

保罗·斯特拉森《门捷列夫梦》是读过关于元周期表最好书。

Yes, I asked which is the lightest element in the periodic table.

是，问元周期表中最轻元是什么。

And you should get used to just opening up that periodic table.

你应该习惯打开元周期表。

I mentioned that uranium is the heaviest element in the periodic table, but which is the lightest?

提到过铀是元周期表中最重元，但哪个元是最轻呢？

Hydrogen has one proton, helium two, lithium three, and so on up the periodic table of elements.

氢有1个质子，氦有2个，锂有3个，按元周期表上元排列顺序即可判断。

Well, what's the periodic table like at the beginning of the universe, the moment of Big Bang?

那宇宙初开，也就是宇宙大爆炸那一刻，元周期表是什么样呢？

The periodic table is an organized display of all the chemical elements in order by atomic number.

元周期表是所有化学元按原子序数有序排列表。

You can see on the periodic table that's going to be H. It's going 1 atomic number.

您可以在元周期表中看到 H。它原子序数为 1。

So here's the periodic table of elements you're used to seeing that you learned in your chemistry class.

所以这里是你习惯于看到元周期表，你在化学课上学到。