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Questions and Answers
The bond angle in a molecule like H2O is 109.5°.
The bond angle in a molecule like H2O is 109.5°.
False
VSEPR theory is based on the attraction between protons in the nuclei of atoms.
VSEPR theory is based on the attraction between protons in the nuclei of atoms.
False
Beryllium chloride (BeCl2) has a linear molecular shape.
Beryllium chloride (BeCl2) has a linear molecular shape.
True
The molecular shape of sulfur dioxide (SO2) is angular or bent.
The molecular shape of sulfur dioxide (SO2) is angular or bent.
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The molecular geometry referred to as trigonal planar has a bond angle of 120°.
The molecular geometry referred to as trigonal planar has a bond angle of 120°.
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A trigonal pyramid has four bonding pairs of electrons.
A trigonal pyramid has four bonding pairs of electrons.
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The molecular shape of carbon containing four single bonds is tetrahedral.
The molecular shape of carbon containing four single bonds is tetrahedral.
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The Great Pyramid of Giza represents a molecular shape known as square pyramid.
The Great Pyramid of Giza represents a molecular shape known as square pyramid.
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The molecule BF3 has a trigonal pyramidal shape.
The molecule BF3 has a trigonal pyramidal shape.
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In VSEPR theory, lone pairs of electrons take up more space than bonding pairs.
In VSEPR theory, lone pairs of electrons take up more space than bonding pairs.
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Study Notes
Molecular Shape:
- Bond Angle: The angle formed between two bonds in a molecule.
- VSEPR Theory: Valence Shell Electron Pair Repulsion Theory. Electron pairs repel each other, minimizing their interactions to achieve the most stable shape.
- Linear Shape: AB2 molecule (two atoms bonded to a central atom). Examples include beryllium chloride (BeCl2) and ethyne (C2H2).
- Trigonal Planar Shape: AB3 molecule (three atoms bonded to a central atom). Examples: Boron trifluoride (BF3), Tavaborole.
- Angular Bent Shape: AB2E molecule (two atoms bonded to a central atom with one lone pair). Example: Sulfur dioxide (SO2).
- Tetrahedral Shape: AB4 molecule (four atoms bonded to a central atom). Examples: Methane (CH4), Carbon tetrachloride (CCl4), and many organic molecules.
- The tetrahedral shape is one of the most important geometries in organic chemistry.
- The tetrahedral shape is also common in inorganic chemistry, especially in compounds involving elements from group 14 (carbon family).
- The angle between any two bonds in a regular tetrahedron is 109.5 degrees.
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Description
Test your knowledge on molecular shapes and bond angles based on VSEPR Theory. This quiz covers various geometries including linear, trigonal planar, angular bent, and tetrahedral shapes. Understand the examples and implications of these molecular configurations in chemistry.
