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Questions and Answers
What is the bond angle in an H2O molecule?
Which molecular shape corresponds to an AB2E configuration?
What does VSEPR stand for?
Identify the molecular shape of BF3.
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Which molecular shape corresponds to an AB4 configuration?
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In which molecular shape do electron pairs distribute to minimize repulsion?
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What molecular shape does sulfur dioxide (SO2) exhibit?
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Which of the following statements about bond angles in a tetrahedral shape is correct?
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What is the molecular shape classification of beryllium chloride (BeCl2)?
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Study Notes
Molecular Shape
- Bond angle: The angle between two bonds in a molecule (A-B-C)
- Water (H2O) bond angle: 104.5 degrees
- VSEPR Theory (Valence Shell Electron Pair Repulsion): Electron pairs around an atom repel each other and position themselves as far apart as possible.
AB2 (Linear)
- Examples: Beryllium Chloride (BeCl2) and Ethyne (C2H2)
AB3 (Trigonal Planar)
- Examples: Boron Trifluoride (BF3) and Tavaborole
AB2E (Angular, Bent)
- Example: Sulfur Dioxide (SO2)
Trigonal Pyramid
- A pyramid with a triangular base.
AB4 (Tetrahedral)
- Examples: Carbon compounds like Methane (CH4), all amino acids, and all proteins
- Example: Drug molecules like L-Dopa and Adderall
- R,L,S configurations (chiral centers), like C in the tetrahedral structure, have a chiral center with four different substituents.
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Description
Explore the different molecular shapes and their corresponding bond angles using VSEPR theory. This quiz covers linear, trigonal planar, angular, and tetrahedral molecules with examples like water, sulfur dioxide, and methane. Test your knowledge on how electron pairs affect molecular geometry.
