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VSEPR (Valence Shell Electron Pair Repulsion) Worksheet that includes various molecules, their Lewis structures, electron geometry, molecular geometry, bond angles, and polarity. However, since I can't view or analyze images directly, I can't see the specific content of your worksheet.
But I can help you solve VSEPR problems if you describe them! Here’s how we can proceed:
🔍 Step-by-Step Guide to Solving VSEPR Problems:
If you tell me the molecule or provide details from the worksheet (e.g., the central atom, number of bonding pairs, lone pairs), I can guide you through:
1.
Draw the Lewis structure
- Count valence electrons.
- Determine bonding and lone pairs.
2.
Determine the steric number
Steric number = number of bonding pairs + number of lone pairs on the central atom.
3.
Electron Geometry
Based on steric number:
- 2 → Linear
- 3 → Trigonal planar
- 4 → Tetrahedral
- 5 → Trigonal bipyramidal
- 6 → Octahedral
4.
Molecular Geometry
Consider only the positions of atoms (not lone pairs):
- Example: Tetrahedral electron geometry with 1 lone pair → Trigonal pyramidal
5.
Bond Angles
- Ideal angles vary by geometry (e.g., 109.5° for tetrahedral).
- Lone pairs reduce bond angles.
6.
Polarity
- Check symmetry and electronegativity differences.
- If dipoles don’t cancel → polar molecule.
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✔ Example Problem:
Let’s say one of the molecules is
NH₃ (ammonia):
- Central atom: N
- Valence electrons: 5 + 3×1 = 8 → 3 bonds, 1 lone pair
- Steric number: 4 → Tetrahedral electron geometry
- Molecular geometry: Trigonal pyramidal
- Bond angle: ~107° (less than 109.5° due to lone pair repulsion)
- Polarity: Polar (due to uneven charge distribution)
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👉 Please describe the molecules or tasks from your worksheet (e.g., "What is the molecular geometry of SF₄?" or "Determine the bond angle in CH₂O"), and I’ll walk you through the solution step-by-step!
Parent Tip: Review the logic above to help your child master the concept of vsepr practice worksheet.
