According to this theory, the atoms consist of a positively charged nucleus surrounded by a stream of electrons kept together by attractive forces from the nucleus.

根据这个理论，原子由一个带正电荷的核组成,由于来自核的吸引力,电子流围绕在核的周围。

麻省理工公开课 - 固态化学导论课程节选

And, it involves a single electron orbiting a positively charged nucleus.

包含了一个单独的电子轨道,一个带正电荷的核。

麻省理工公开课 - 固态化学导论课程节选

So, what we're looking at here is the force when we have two charged particles, one positive one negative -- here, the nucleus and an electron.

我们现在研究的是,一正一负俩个带电粒子之间的,作用力-在这里。

麻省理工公开课 - 化学原理课程节选

It has a nucleus at the center charged positively.

中心有个带正电的原子核。

麻省理工公开课 - 固态化学导论课程节选