And if l is zero, that means our third quantum number, the orbital in which our electron is located is the s orbital. So to represent this in an electron configuration way, we simply do the following. We put a coefficient in front of our S. So the Wand represents our shell, our principal quantum number. Our S represents our subshell. And at the same time, it also represents our orbital in which our electron is in. The SuperScript of one represents the number of electrons.