1. Lewis Structure:
* Boron (B): Has 3 valence electrons.
* Fluorine (F): Has 7 valence electrons.
* Total valence electrons: 3 (B) + 3(7) (F) = 24
* Boron (B): Forms 3 single bonds with fluorine, using all 3 of its valence electrons.
* Fluorine (F): Each fluorine forms a single bond with boron, leaving 6 non-bonding electrons (3 lone pairs) on each fluorine atom.
2. Electron Pair Count:
* Bonding pairs: 3 (one for each B-F bond)
* Non-bonding pairs: 6 (3 lone pairs on each fluorine atom)
Therefore, BF3 has 3 bonding electron pairs and 6 non-bonding electron pairs.
