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The degree of covalent character is determined by the difference in electronegativity between the two atoms. The greater the difference, the more ionic it is, and in turn, the less covalent it is. You can figure which molecules have greater differences in electronegativity by using the elecronegativity trends on the periodic table.
KaitlynWatkins1C wrote:This problem is in the 2013 Final (question 3C) and it says the answer AgF, but why is AgF less covalent than BeCl2?
I had the same question. Since Be and Cl are the farthest from each other on the periodic table, wouldn't they technically be the most ionic compound and therefore the least covalent?
AgF is less covalent than Becl2 because Fluorine is the most electronegative element on the periodic table its most likely to just take the electron to get to the octet state rather than share which is what covalent bonding is.
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