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

原子的心是的原子核，有正荷。

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

原子核和子之间的动力将原子固定在一起。

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

们又在哪里呢？别着急，们还是在那里，不过只在正间一点点地方。所以们被称为原子核。

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

具体地说，原子核比原子小十万倍。

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

子绕着原子核旋转，们的负荷会被质子的正荷所吸引。

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大致相等的原子核的过程。

In fission, the splitting of a nucleus generates energy.

在裂变，原子核分裂产生能量。

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

为得到答案，物理学家瞄微子——在原子核反应射出的基础粒子。

Streaming out of a nuclear reactor of course!

当然得出现一个原子核反应！

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子。

An atom's nucleus has a positive charge.

原子核正荷。

Electrons orbiting the nucleus have a negative charge.

围绕原子核运行的子负荷。

If CERN's neutrinos really are travelling faster than light, it is therefore a big deal.

因此，如果欧洲原子核研究组织的微子果真跑得比光快，这一结果的确意义重大。

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

约 90% 是质子， 9% 是氦核， 1% 是较重的原子核。

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

汤普森在这发现子，卢瑟福在这分裂出原子核。

The nucleus and the electrons going around the atom.

原子核和绕着原子运动的子。

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。

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

劳伦斯先生因其在原子核物理学方面的贡献获得1939年的诺贝尔奖。

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

在金属原子，最外层子与原子核连接微弱。

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有多少质子。