Questions: Which of the following Lewis Structures is wrong?

Which of the following Lewis Structures is wrong?
Transcript text: Which of the following Lewis Structures is wrong?
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Solution

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Solution Steps

Step 1: Identify the Valence Electrons
  • Carbon (C) has 4 valence electrons.
  • Hydrogen (H) has 1 valence electron.
  • Boron (B) has 3 valence electrons.
  • Fluorine (F) has 7 valence electrons.
  • Nitrogen (N) has 5 valence electrons.
Step 2: Check Octet Rule Compliance
  • Carbon typically forms 4 bonds to complete its octet.
  • Hydrogen forms 1 bond.
  • Boron can be stable with 6 electrons (3 bonds).
  • Fluorine forms 1 bond and has 3 lone pairs.
  • Nitrogen typically forms 3 bonds and has 1 lone pair.
Step 3: Evaluate Each Structure

  1. First Structure (CH3B)

    • Carbon has 4 bonds (satisfied).
    • Boron has 4 bonds (incorrect, should have 3 bonds).

  2. Second Structure (CH3F)

    • Carbon has 4 bonds (satisfied).
    • Fluorine has 1 bond and 3 lone pairs (satisfied).

  3. Third Structure (CH3N)

    • Carbon has 4 bonds (satisfied).
    • Nitrogen has 3 bonds and 1 lone pair (satisfied).

Final Answer

The first structure (CH3B) is wrong because Boron should have 3 bonds, not 4.

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