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

变是指一个原子核两个大致相等原子核过程。

An atom's nucleus has a positive charge.

原子核带正电荷。

In fission, the splitting of a nucleus generates energy.

在变中，原子核产生能量。

Electrons orbiting the nucleus have a negative charge.

围绕原子核运行电子带负电荷。

Outside the nucleus are electrons which have a negative charge.

原子核外是带负电荷电子。

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

具体地说，原子核比原子小十万倍。

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

原子中心是它原子核，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，轻原子核合并——或者“聚变”——形一个原子核。

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

每一种元素原子核周围都有一定数量电子。

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

原子核和电子之间电动力将原子固定在一起。

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

原子类型取决于其原子核中有多少质子。

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

一种元素原子序数是其原子核中质子数。

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，卢瑟福在这出了原子核。

An atom's nucleus is surrounded by a cloud of orbiting electrons.

原子核周围环绕着一团按轨道运行电子群。

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。

Streaming out of a nuclear reactor of course!

当然得出现一个原子核反应！

Unlike the graceful motion of planets, the atomic nuclei are chaotic blurs.

和优雅地移动行星不同，原子核是很混乱。

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

每个原子都由原子核，以及围绕它电子云组。

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原子核。

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

尽管与整个原子相比，原子核小得不可思议。