# What is the difference in electronegativity between magnesium and chlorine when they react to form magnesium chloride?

${\Delta}_{E N} = E {N}_{\text{Cl" - EN_"Mg}}$
${\Delta}_{E N} = 3.16 - 1.31 = \textcolor{g r e e n}{1.85}$
This difference in electronegativity values implies that the bond between the magnesium cation, $M {g}^{2 +}$, and the chloride anion, $C {l}^{-}$, has predominant ionic character.