Well, they're in there, but only in the very center. That's called the nucleus.

它们又在哪里呢？别着急，它们还是在那里，不过只在正中间一点点地方。所以它们被称为。

To get some answers, physicists look at neutrinos, fundamental particles emitted during nuclear reactions.

为了得到答案，物理学家瞄向了中——在反应中射出的基础粒。

Every element has a specific number of electrons surrounding the nucleus.

每一种元素的周围有一定数量的电。

An atom's nucleus has a positive charge.

带正电荷。

Around 90% are protons, 9% are helium nuclei, and 1% are heavier nuclei.

约 90% 是质， 9% 是氦， 1% 是较重的。

Atoms consist of an atomic nucleus surrounded by a cloud of electrons.

每个由，以及围绕它的电云组成。

It's not in a nucleus at all.

它根本不在里。

Outside the nucleus are electrons which have a negative charge.

外面是带负电荷的电。

This is where J.J. Thomson discovered the electron, and where Rutherford split the atom.

汤普森在这发现了电，卢瑟福在这分裂出了。

What's holding those electrons around that nucleus is going to be Coulomb's Law.

是什么让这些电围绕着那个, 这就是库仑定律。

At the center of an atom is its nucleus which has a positive electric charge.

的中心是它的，它带有正电荷。

In fact, it's about a hundred thousand times smaller.

具体地说，比小十万倍。

Mister Lawrence had won the Nobel Prize in nineteen thirty-nine for his work in nuclear physics.

劳伦斯先生因其在物理学方面的贡献获得了1939年的诺贝尔奖。

An element's atomic number is the number of protons in its nucleus.

一种元素的序数是其中的质数。

Fission refers to the process where one nucleus splits into two roughly equal nuclei.

裂变是指一个分裂成两个大致相等的的过程。

Streaming out of a nuclear reactor of course!

当然得出现一个反应！

And iron is the first nucleus where you don't get any energy out of fusing it.

而铁是第一个不能从聚变中获取能量的。

Electrons orbiting the nucleus have a negative charge.

围绕运行的电带负电荷。

The electric force between the nucleus and the electrons holds the atom together.

和电之间的电动力将固定在一起。

To free electrons, something has to make them whirl fast enough to break away from their nuclei.

为了释放电，必须使电高速旋转而足以摆脱的束缚。