8.3 Bonding Theories

A molecular orbital that can be occupied by two electrons of a covalent bond is called a bonding orbital.

• True

• False

When two atomic orbitals combine to form a molecular orbital that is symmetrical around the axis connecting two atomic nuclei, a .................... bond is formed

• pi

• sigma

In a ..................... the bonding electrons are most likely to be found in sausage-shaped regions above and below the bond axis of the bonded atoms.

• sigma bond

• pi bond

Atomic orbitals in pi bonding overlap..................... than in sigma bonding

• less

• more

States that “the repulsion between electron pairs causes molecular shapes to adjust so that the valence-electron pairs stay as far apart as possible”.

• VSEPR theory

• Dalton theory

• Particle theory

Orbital hybridization provides information about both molecular bonding and molecular shape.

• True

• False

In hybridization, several atomic orbitals mix to form the same total number of equivalent hybrid orbitals.

• True

• False

Use the VSEPR theory to predict the the shape of methane CH₄ molecule.

Use the VSEPR theory to predict the the shape of water molecule.

Use the VSEPR theory to predict the the shape of ammonia molecule.