U2E2 Review

Front

What is a nonpolar molecule?

Back

A nonpolar molecule is a molecule that has an even distribution of electrical charge, resulting in no distinct positive or negative poles. Examples include BF₃ and CH₄.

Front

Which molecule is nonpolar: BF₃, CH₃Br, SO₂, or H₂O?

Back

BF₃ is a nonpolar molecule.

Front

What is the hybridization of the central atom in xenon difluoride (XeF₂)?

Back

The central atom, xenon, is sp³d hybridized.

Front

How many lone pairs of electrons are around the central atom in xenon difluoride?

Back

There are 3 lone pairs of electrons around the central atom.

Front

What is the difference between sigma (σ) and pi (π) bonds?

Back

Sigma bonds are formed by the head-on overlap of atomic orbitals, while pi bonds are formed by the side-to-side overlap of p orbitals.

Front

How many σ and π bonds are in a molecule with 5 σ and 2 π bonds?

Back

The molecule contains 5 sigma bonds and 2 pi bonds.

Front

What does sp² hybridization imply about a carbon atom?

Back

Sp² hybridization implies that the carbon atom is involved in one pi bond and has a trigonal planar geometry.

Front

What is the Lewis structure of N₂H₂?

Back

The Lewis structure shows each nitrogen atom bonded to another nitrogen atom with a single bond and each nitrogen has one nonbonding electron pair.

Front

What is a lone pair of electrons?

Back

A lone pair of electrons is a pair of valence electrons that are not shared with another atom and are not involved in bonding.

Front

What is the significance of hybridization in molecular geometry?

Back

Hybridization helps determine the shape and bond angles of a molecule based on the mixing of atomic orbitals.