Questions: Which of the following Lewis Structures is wrong?

Solution Steps

• 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.

• 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.

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