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Questions and Answers
Match the following molecular geometries with their corresponding electron pair arrangements and approximate bond angles:
Match the following molecular geometries with their corresponding electron pair arrangements and approximate bond angles:
Bent = 2, 2, , <109.5° (<105°) Tetrahedral = 4, 0, 109.5° See-Saw = 5, 1, 90°, <120° Square Planar = 6, 2, 90° Square Pyramidal = 6, 1, 90°, <90° Trigonal Bipyramidal = 5, 0, 90°, 120° Linear = 2, 0, 180°
What is the electron pair arrangement and approximate bond angles for a molecule with 4 electron groups and 2 lone pairs?
What is the electron pair arrangement and approximate bond angles for a molecule with 4 electron groups and 2 lone pairs?
- Square planar, 90°
- Bent, <109.5° (<105°) (correct)
- Tetrahedral, 109.5°
- Trigonal bipyramidal, 90°, 120°
A molecule with 5 electron groups with 1 lone pair has what electron pair arrangement and molecular geometry?
A molecule with 5 electron groups with 1 lone pair has what electron pair arrangement and molecular geometry?
- See-saw, 90°, <120° (correct)
- Trigonal bipyramidal, 90°, 120°
- Tetrahedral, 109.5°
- T-structure, <90°
What is the bond angle of a molecule with a linear electron pair arrangement?
What is the bond angle of a molecule with a linear electron pair arrangement?
A molecule with 6 electron groups and 0 lone pairs has an octahedral molecular geometry.
A molecule with 6 electron groups and 0 lone pairs has an octahedral molecular geometry.
What is the electron pair arrangement for a molecule with 4 electron groups and 1 lone pair?
What is the electron pair arrangement for a molecule with 4 electron groups and 1 lone pair?
A molecule with 5 electron groups and 2 lone pairs has a T-shaped molecular geometry.
A molecule with 5 electron groups and 2 lone pairs has a T-shaped molecular geometry.
Flashcards
Electron Pair Arrangement
Electron Pair Arrangement
The arrangement of electron groups (bonding pairs and lone pairs) around a central atom.
Molecular Geometry
Molecular Geometry
The shape of a molecule determined by the positions of the atoms.
Bond Angle
Bond Angle
The angle formed between two adjacent bonds.
Linear Electron Pair Arrangement
Linear Electron Pair Arrangement
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Linear Molecular Geometry
Linear Molecular Geometry
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Trigonal Planar Electron Pair Arrangement
Trigonal Planar Electron Pair Arrangement
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Trigonal Planar Molecular Geometry
Trigonal Planar Molecular Geometry
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Bent Electron Pair Arrangement
Bent Electron Pair Arrangement
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Bent Molecular Geometry
Bent Molecular Geometry
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Bond Angle in Linear Geometry
Bond Angle in Linear Geometry
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Study Notes
Molecular Geometry
- Electron pairs and lone pairs affect molecular shape.
- Electron pair arrangement and molecular geometry are not always the same
- Different numbers of lone pairs and electron groups result in different molecular shapes.
- Bond angles are affected by repulsion between electron pairs.
Specific Geometries and Bond Angles
- 2 Electron Groups:
- Linear arrangement: 180° bond angle
- 3 Electron Groups:
- Trigonal planar arrangement: 120° bond angle
- Bent arrangement: <120° bond angle
- 4 Electron Groups:
- Tetrahedral arrangement: 109.5° bond angle
- Trigonal pyramidal arrangement: <109.5° (~107°) bond angle
- Bent arrangement: <109.5° (~105°) bond angle
- 5 Electron Groups:
- Trigonal bipyramidal arrangement: 90°, 120° bond angles
- See-saw arrangement: <90°, <120° bond angles
- T-shaped arrangement: <90° bond angle
- Linear arrangement: 180° bond angle
- 6 Electron Groups:
- Octahedral arrangement: 90°, 90° bond angles
- Square pyramidal arrangement: 90°, <90° bond angles
- Square planar arrangement: 90° bond angle
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