And so you can look, for example, at the Periodic Table And, if you look up the atomic mass of carbon, 011 you will see that carbon comes at 12.011 for carbon.

如你们所见，例如，在周期表中,如果你观察碳的原子质量，你会看到是12。

麻省理工公开课 - 固态化学导论课程节选

And then we're going to name the atomic orbitals that make it up, and it's being made up of a carbon 2 s p 3 orbital, and a hydrogen 1 s orbital.

然后我们要命名,组成它的原子轨道，它是由碳2sp3轨道，和氢原子1s轨道组成。

麻省理工公开课 - 化学原理课程节选