Unit 3 Chemistry Modeling

Which of the following compounds is correctly matched with its molecular geometry according to Valence Shell Electron Pair Repulsion (VSEPR) Theory?

• BeH₂: linear

• H₂O: trigonal planar

• CCl₄: linear

• PCl₃: tetrahedral

According to the Valence Shell Electron Pair Repulsion (VSEPR) Theory, which of the following chemicals would most likely have the shape of the model seen above?

• Xenon tetroxide

• Oxygen difluoride

• Carbon monoxide

• Sulfur trioxide

According to the VSEPR theory, which shape represents the molecule, CF₄?

• Trigonal planar

• Tetrahedral

• Octahedral

• Linear

During exam review, one student quizzes another’s knowledge of molecular shape. Which molecule-molecular shape pair matches the description on the card?

• HCN, Linear

• BeH₂, Linear

• H₂O, Bent

• CO₂, Linear

Which of these diatomic molecules has a linear molecular shape with a double covalent bond?

• H₂

• N₂

• O₂

• F₂

According to the VSEPR theory, what is the shape of the molecule shown above?

• Angular/bent

• Linear

• Tetrahedral

• Trigonal planar

What characteristic of metallic bonds allows metals to be malleable and ductile?

• The tightly held valence electrons in metallic bonds allow the atoms in a metal to move freely.

• The strong connection between atoms in metallic bonds allows the bonds to bend without breaking.

• The sea of free electrons in metallic bonds allow the atoms to move when stressed without changing the properties of the substance.

• The crystal structure of atoms in metallic bonds allows the metal to maintain a constant pattern when force is applied.

What type of solid can best be described as a good conductor of heat and electricity?

• Molecular

• Metallic

• Network

• Ionic

Identify the element listed that can be forced through a hole under great pressure and drawn out in a long, continuous wire due to its metallic bonding.

• Nickel

• Nitrogen

• Selenium

• Silicon

Which of these is the electron-dot diagram for Br2(l)?

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