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QuestionChemistry

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Step 1:
I'll solve this problem step by step for both Lewis structures, following the precise LaTeX formatting guidelines:

For $$\mathrm{ICI}_{4}^{-}$$ Lewis Structure:

Step 2:
: Count total valence electrons

- Total valence electrons: $$7 + 28 + 1 = 36$$ electrons
- Iodine (I): 7 valence electrons - Chlorine (Cl): 7 valence electrons × 4 = 28 - Negative charge adds 1 electron

Step 3:
: Place central atom

- Iodine (I) is the central atom

Step 4:
: Distribute electrons around outer atoms

- Place 4 chlorine atoms around central iodine - Connect each chlorine with single bonds - Distribute remaining electrons as lone pairs on chlorines

Step 5:
: Complete central atom's electron configuration

For $$\mathrm{SO}_{3}$$ Lewis Structure:
- Remaining electrons go around central iodine as lone pairs

Step 6:
: Count total valence electrons

- Total valence electrons: $$6 + 18 = 24$$ electrons
- Sulfur (S): 6 valence electrons - Oxygen (O): 6 valence electrons × 3 = 18

Step 7:
: Place central atom

- Sulfur (S) is the central atom

Step 8:
: Connect oxygen atoms to sulfur

- Create three single bonds between sulfur and oxygen atoms - Distribute remaining electrons as lone pairs on oxygen atoms

Step 9:
: Adjust bonding to satisfy octet rule

- If needed, convert single bonds to double bonds to complete octets

Final Answer

- For \mathrm{ICI}_{4}^{-}: A Lewis structure with iodine at center, four chlorines bonded, with additional lone pairs - For \mathrm{SO}_{3}: A Lewis structure with sulfur at center, three oxygen atoms bonded, potentially with double bonds to satisfy octet rule Note: Precise visual representation would require drawing the actual Lewis structure, which cannot be done in text format.