[pomalidomide]

Why is the bond between Ca and I ionic and not polar covalent as according to its electronegativity? I know that Ca and I forms an ionic compound, CaI₂ but when taking the electronegativity of Ca, 1.0, and I, 2.5, into consideration, the difference is 1.5 which would make it a polar covalent bond.

In the future, do I have to take into consideration whether the compound is ionic or covalent before I decide on what type of bond is in between the atoms of the compound?

[AWK]

CaI₂ is soluble in water and acetone. What does it mean.

[chenbeier]

Why it should do. 1.5 is a big difference.