Question

Consider the given lewis dot structure:

The formal charges on $B$ and $F$ are respectively.

• A. $-1,0$
• B. $-1,-1$
• C. $0,-1$
• D. $-1,+1$

Answer 1

The correct option is A $-1,0$

Formal Charge = [valence electrons on atom] - [non-bonded electrons + number of bonds].
$B=3-[0+4]=-1$
$F=7-[1+6]=0$