Oh, and actually before you skip your page in the notes, I realized I should write out for you what the addition is to start with. So, when we're combining two waves, 1sb what we have is 1 s a that we're adding together with 1 s for b, the second atom.

在你们翻过这页讲义之前，我觉得我应该写出加法,当我们把两个波函数放在一起时，我们用1sa加上，第二个原子。

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