The gas atom density exhibits a concave profile in radial direction.

气体原子密度的径向分布呈一凹形。

youdao

For the other two methods, the ion extraction characteristics were computed for various conditions such as applied voltage, initial atom density and abundance of the aimed isotope.

对另外两种静电场方法，计算了不同外加电压、不同的初始原子密度和不同的目标同位素丰度等条件下的离子引出情况。

youdao

The spatial distribution of that image represents the electron density around the atom.

图像的空间分布就代表了原子周围的电子密度。

youdao

Sometimes we have a very electronegative atom that's going to take more of its equal share of electron density.

有时候我们会有一个电负性很高的原子,它将会获取更多的共用电子密度。

麻省理工公开课 - 化学原理课程节选

And when we take the wave function and square it, that's going to be equal to the probability density of finding an electron at some point in your atom.

当我们把波函数平方时，就等于在某处,找到一个电子的概率密度。

麻省理工公开课 - 化学原理课程节选

So you can think about how these 2 things combined are going to be electronegativity, which is a measure of how much an atom wants to pull electron density away from another atom.

因此你可以想象出,这两样性质合起来就是电负性，也就是一个度量，关于一个原子,有多希望把另一个原子的电子密度拉过来的。

麻省理工公开课 - 化学原理课程节选