Which halide of magnesium has the highest ionic character?

Step-by-step solution

Size of anion is I − > B r − > C l − > F − . As the size increases, polarisation of an anion is more, hence when covalent character increases ionic character decreases. Order of ionic character is M g F 2 > M g C l 2 > M g B r 2 > M g I 2 Hence Magnesium fluoride has the highest ionic character.