Posted by **jessie** on Sunday, February 13, 2011 at 12:35pm.

Formal charge: kind of confused?

why cant i get -1?

tinypic

. com

/view.php?pic=14buuti&s=7

ok in class we did this.

and for O FC= 6-4-3=+1

but S FC = -1 (I get 6-4-1= +1) which is wrong. what am i doing wrong?

i solve by doing: group # - total (bonds and lone pairs(each = 1)) - lone pairs (each pair = 1)