Molecular Geometry & IMFs

Which of the following molecules has a tetrahedral shape?

• CF₄

• CH₂O

• SO₃

• H₂O₂

How do lone pairs of electrons affect the bond angles in a molecule?

• Lone pairs have no effect on bond angles because they do not participate in bonding.

• Lone pairs affect the length of the bond not the bond angle.

• Lone pairs increase bond angles because bonded electrons are attracted towards the lone pair which cause the bonds within a molecule to spread apart.

• Lone pairs decrease bond angles because they occupy more space than bonded electrons which squeezes the bonds within the molecule closer together.

Which of the following elements is most likely to be the central atom when drawing Lewis structures?

• Bromine (Br)

• Carbon (C)

• Potassium (K)

• Hydrogen (H)

According to VSEPR theory, what does the arrangement of electron pairs around a central atom determine?

• the color of the compound

• the boiling point of the substance

• the molecular geometry

• the type of hybridization

What does VSEPR stand for?

• Vanadium Selenium Phosphorus Radon

• Valence Sub-Electron Possible Repulsion

• Valence Shell Electron Pair Repulsion

• Valence Shell Electrons Protrude Randomly

Which molecule would have a double bond?

• O₂

• F₂

• HCl

• Cl₂

What are the two key factors that affect the polarity of a molecule?

• asymmetry and valence electrons

• asymmetry and lone pairs of electrons on the central atom

• symmetry and bonding pairs of electrons

• symmetry and the type of bond (single, double, or triple)

The following molecules contain polar bonds. Which is the only polar molecule?

• NH₃

• CCl₄

• CO₂

• CH₄

Which elements, in addition to hydrogen, commonly participate in hydrogen bonding in polar molecules?

Click on the elements in the periodic table.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Place the intermolecular forces in order from weakest to strongest.

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