And then around that dot, there's another shell, which is the second energy shell.

然后围绕那个点，还有另一个壳，这是第二个能量壳。

The second energy shell is just this blue shell over it.

第二个能量壳就是它上面的这个蓝色壳。

And then you start filling the second energy shell.

然后你开始填充第二个能量壳。

And so now it has to go to the second energy shell, and that works out relative to what I told you before, because it's in the second period.

所以现在它必须进入第二个能量层，这与我之前告诉你的相关，因为它处于第二个周期。