Intermolecular Forces

In the Lewis structure of CH3Br, which atom carries a partial negative charge?

• Carbon

• Hydrogen

• Bromine

• None

The CH3Br molecule is _______ due to its asymmetrical shape.

• Nonpolar

• Polar

• Neutral

• Ionic

What causes electrons to be pulled toward the Br atom in a polar bond?

• A) Its high electronegativity

• B) Its low electronegativity

• C) Its atomic size

• D) Its atomic mass.

What characteristic of a molecule causes it to act like a tiny magnet?

• Being non-polar

• Having partial charges

• Being neutral

• Having no charges

What is an intermolecular force?

• A) A force of repulsion between molecules

• B) A force of attraction between molecules

• C) A force that separates molecules

• D) A force that compresses molecules.

Intermolecular forces make molecules ______ together due to partial charges.

• repel

• stick

• separate

• compress

A dipole-dipole force is a force of attraction between ______ molecules.

• non-polar

• polar

• ionic

• metallic

What is hydrogen bonding?

• A) A type of covalent bond

• B) An extra strong dipole-dipole force

• C) A type of ionic bond

• D) A weak van der Waals force.

Hydrogen bonding occurs when a hydrogen atom is bonded to which of the following elements? Fill in the blank: F, O, or ____.

• A) C

• B) N

• C) S

• D) Cl

Fill in the blank: The elements Fluorine, Oxygen, and Nitrogen are known for their high ________, which contributes to strong hydrogen bonding.

• Density

• Electronegativity

• Atomic Mass

• Volume