Britannica Sources used in this answer

What is the electron configuration of boron?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

A labeled diagram of the periodic table entry for boron shows its atomic number 5, symbol B, electron configuration, atomic weight range, and classification as a solid, weakly acidic, other nonmetal with a rhombohedral crystal structure at room temperature. — boron Properties of boron.

The ground-state electron configuration of boron is $1 s^{2} 2 s^{2} 2 p^{1}$ .1