Question

Question #b71e0

Answer 1

3

Explanation:

The electron configuration of boron is `1s^2 2s^2 2s^1`

Valence electrons are the ones in the highest energy levels. For boron this would be the 2 electrons in the 2s sublevel and the 1 electron in the 2p sublevel.

The videos below might be helpful for this concept.

Hope this helps!