In fact, if any electron comes in their midst, they'll capture it because the binding energy is so high.

事实上，如果电子从中间进来，它们会捕获它，因为束缚能很大。

Binding energy affects nuclear mass.

能量结合能影响原子核质量。

So for n equals 2, what would the binding energy be?

对n等于2，结合能是多少？

What is the binding energy of the ground state electron in hydrogen?

氢在基态的情况下，它的电子结合能是多少？

The binding energy of the deuteron can be found experimentally.

可以实验测定氘的结合能。