因为每一行开始了一个新的能级，我们能够预言从上到下原子大小逐渐增加。

Because each row begins a new energy level, we can predict that the size of atoms increases from top to bottom.

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在去年的毕业典礼上，伯恩斯以漫画书《原子大小的重要性》给了家人意外的惊喜。

Berns surprised her family with her comic book "Atomic Size Matters" at her graduation last year.

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那么，问题在此，你能否将一只铅笔平衡在其原子大小的尖端，而不需要动态平衡吗？

So the question is this: Can you balance a pencil sharpened to a perfect single atom wide tip on its tip, without active stabilization?

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It is about 10,000 to one, the ratio 10000 of the nuclear dimension to the entire atomic dimension.

原子核和整个原子的大小比例,约为1：

麻省理工公开课 - 固态化学导论课程节选

So, essentially you've got a positive ball which is identical to the size of the atom.

首先你要有一个和原子差不多大小的,带正电荷的球。

麻省理工公开课 - 固态化学导论课程节选

If we think of the size of a typical atom, we would say that would be about 10 to the negative 10 meters. So, we can see the diameter of a nucleus is absolutely smaller really concentrating that mass into a very small space.

一个普通细胞的大小，抱歉，我和细胞核搞混了0,如果我们考虑，一个普通原子的大小,这大概是10的负十次方米,所以原子核的直径确实非常小,真的是把质量。

麻省理工公开课 - 化学原理课程节选