[php snippet=1]
Which of the following compounds has the greatest ionic character in its bonds? (You may consult a Periodic Table)

Loading ...
Correct Answer: D. RbCl
Ionic character increases with increasing electronegativity of the potential anion and decreasing electronegativity of the potential cation. Electronegativity increases as one moves to the top right-hand corner of the periodic table, and decreases in the opposite direction.
Since the potential anion of all four compounds in question is chloride, we only need to find the compound with the cation located furthest toward the bottom left-hand corner of the periodic table. This compound is RbCl.
Today’s question has been brought to you by Gold Standard MCAT.
Get more passage-based questions at Gold Standard MCAT.
Subscribe below to receive the MCAT Question of the Day delivered straight to your inbox every morning.