# Question #be740

Apr 5, 2017

+3

#### Explanation:

The 5 protons means that the element is Boron atomic number 5

To be stable Boron would lose the $2 {s}^{2} 2 {p}^{1}$ electrons to achieve the stable electron configuration of Helium $1 {s}^{2}$

This leaves Boron with 2 electrons and 5 protons. This gives

$2 {e}^{\text{-}} + 5 {p}^{+} = {3}^{+}$