# Problem: What are the formal charges on the sulfur (S), carbon (C), and nitrogen (N) atoms, respectively, in the resonance structure that contributes most to the stability of the thiocyanate ion, SCN-?The possible resonance structures for the thiocyanate ion, SCN-?

###### FREE Expert Solution

We are being asked to determine the formal charges on the sulfur (S), carbon (C), and nitrogen (N) atoms, respectively, in the resonance structure that contributes most to the stability of the thiocyanate ion, SCN-

First, we will have to draw the Lewis Structure of SCN- and determine its resonance structures.

Step 1: Determine the central atom in this molecule.

C → least electronegative atom → central atom

Step 2: Calculate the total number of valence electrons present.

SCN:

Group            Valence Electrons
S         6A                   1 x 6 e- = 4 e-
C         4A                   1 x 4 e- = 6 e-
N         5A                   1 x 5 e- = 5 e-
- charge                                   + 1 e-
Total: 16 valence e-

Step 3: Draw the Lewis Structure for the molecule

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###### Problem Details

What are the formal charges on the sulfur (S), carbon (C), and nitrogen (N) atoms, respectively, in the resonance structure that contributes most to the stability of the thiocyanate ion, SCN-?

The possible resonance structures for the thiocyanate ion, SCN-?