My image: http://i54.tinypic.com/1zxv4le.jpg
My problem is counting the total # of electrons.
I calculated by getting the quantity of N's available (in this case 3) and multiplying by N's group # (5)
So: 3•5= 15 + 1e-= 16 total e-
But in the image I showed you that I'm getting, I see 18...