# What would the charge be on an ion of boron be?

Boron would have a $+ 3$ charge.
Boron has an atomic number of $5$. For an atom to be an ion, it wants to have full electron shells with the "minimum number" (this is hard to explain). So that means that boron would either want $2$ electrons or $10$ electrons. Of course, it would be easier to have $2$ electrons from $5$ electrons, so there it will lose $3$ electrons, and would have a final charge of $+ 3$.