Question

For the bonds in these molecules:

LiCl, Br2, NaF, CO2, BCl3

Which has the most ionic character? Which has the most covalent character? Which two bonds have the same ionic character?

Are my answers correct? Please use electronegavitiy to explain why. I'm mostly confused on the third question, which two bonds have the same ionic character, because the homework is telling me I'm both correct and incorrect for that question? Thank you for your assistance.

Lici Br2 NaF CO, BCI Which has the most ionic character? Which has the most covalent character? Which two bonds have the same ionic character? Which bond has the most ionic character? Which bond has the most covalent character? Which two bonds have the same ionic character? Li-CI ✓ Li-C1 Li-CI Br-Br Na-F Br-Br O Na-F Br-Br Na-F C-o B-CI C-O OO B-CI

Answer 1

Fajan's rules for the prediction of bond character can be summarized in two points: Large cation with low positive charge + small anion → ionic. Small cation with high positive charge + large anion → covalent.

1st second is correct

The ionic/covalent character can be determined using the periodic table. The greater the difference in electronegativity between the atoms, the greater the ionic character of the bond.

so CO and BCl is having same electronegative difference thats why they have same ionic character

CO= 3.5-2.5=1.0

BCl=3.0-2.0=1.0

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