# From a consideration of the Lewis structure of the thiocyanate ion, SCN–, in which carbon has a double bond with both the sulfur and nitrogen atoms, what are the formal charges on the sulfur, carbon, and nitrogen atoms?

Well, we got ${6}_{S} + {4}_{C} + {5}_{N} + {1}_{\text{negative charge}} = 16$ $\text{valence electrons}$ to distribute over 3 centres...
$N \equiv C - {S}^{-}$, else, ""^(-)N=C=S.