Most Ionic Bond (2.D.3 7th ed)

[Ahmed Mahmood 4D]

The textbook states that out of BaBr2, BeBr2, and BBr3, BaBr2 is the most ionic bond. Aside from difference in electronegativity/charge, what indicates that BaBr2 is more ionic than BeBr2?

[Chem_Mod]

The most significant difference between Be and Ba is the size. Ba is much further down on the periodic table and has a larger atomic radius. Ba can't hold onto its electrons as tightly as Be because the electrons are so far. This makes Br more likely to take those electrons.