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

裂变是指一个原子核分裂成两个等的原子核的过程。

An atom's nucleus has a positive charge.

原子核带正电荷。

Streaming out of a nuclear reactor of course!

当然得出现一个原子核反应！

In fission, the splitting of a nucleus generates energy.

在裂变中，原子核分裂产生能量。

The nucleus and the electrons going around the atom.

原子核绕着原子运动的电子。

Electrons orbiting the nucleus have a negative charge.

围绕原子核运行的电子带负电荷。

What you're really doing is you're splitting the nucleus.

你实际上要分裂原子核。

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

原子核电子之间的电动力将原子固定在一起。

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

具体地说，原子核比原子十万倍。

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

原子的中心是它的原子核，它带有正电荷。

In fusion, light nuclei merge — or " fuse" — to form one heavier nucleus.

在核聚变过程中，轻的原子核合并——或者“聚变”——形成一个较重的原子核。

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

每一种元素的原子核周围都有一定数量的电子。

Outside the nucleus are electrons which have a negative charge.

原子核外面是带负电荷的电子。

The type of atom depends on how many protons it has in the nucleus.

原子的类型取决于其原子核中有多少质子。

And the nucleus is incredibly tiny compared tothe overall size of the atom.

尽管与整个原子比，原子核得不可思议。

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

汤普森在这发现了电子，卢瑟福在这分裂出了原子核。

In a metal atom, the outermost electrons are only weakly attached to the nucleus.

在金属原子中，最外层电子与原子核连接微弱。

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原子核。

The atomic nucleus is densely packed with protons and neutrons bound by a powerful nuclear force.

原子核密集地包裹着由强核力所束缚的质子中子。

Electrons whiz around the nucleus, their negative charge attracted by the protons' positive charge.

电子绕着原子核旋转，它们的负电荷会被质子的正电荷所吸引。