# How many electrons does the iron ion have when it forms the ionic compound FeCl_3?

$F {e}^{3 +}$ has $\text{5 d electrons}$
The iron atom has 26 electrons in total; it must have if $Z = 26$; why $\text{must?}$ And thus upon oxidation.......
$F e \rightarrow F {e}^{3 +} + 3 {e}^{-}$