# How do you write the noble-gas electron configuration for boron?

The noble gas configuration is ["He"]"2s"^2"2p"^1".
In the case of boron, it is in period 2 on the periodic table, so the noble gas will be helium, $\left[\text{He}\right]$, which is the noble gas in period 1. Because boron is in group 13, its electron configuration will end with 2s and 2p sublevels. Therefore, the noble gas electron configuration of boron would be ["He"]"2s"^2"2p"^1".