Determine the number of the resonance structures for SO_{3}^{2-}^{ }by drawing its Lewis structure and analyze which structure completely follows octet rule

**Follow the steps below:**

Step 1. Determine the central atom

Step 2. Determine the total valence electrons

Step 3. Draw the Lewis structure and calculate necessary formal charges

Step 4. Analyze which of the structure follows the octet rule

**Step 1: Determine the central atom in this molecule.**

• S → less electronegative atom than O → S is *central atom*

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

**SO _{3}^{2-}:**

Group **Valence Electrons**

S 6A 1 x 6 e^{‑} = 6 e^{-}

O 6A 3 x 6 e^{‑} = 18 e^{-}

-2 charge +2 e^{-}^{ }Total = **26 valence e ^{-}**

**Step 3: Draw the Lewis Structure for the molecule**

How many different types of resonance structures can be drawn for the ion SO_{3}^{2- }where all atoms satisfy the octet rule?

A) 1

B) 2

C) 3

D) 4

E) 5

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Based on our data, we think this problem is relevant for Professor Huchital's class at FAU.