Ch. 8

Question 1

Molecular orbital located outside of the region between two nuclei; electrons in an antibonding orbital destabilize the molecule

Answer 1

Antibonding orbital

Question 2

Number of pairs of electrons between two atoms; it can be found by the number of bonds in a Lewis structure or by the difference between the number of bonding and antibonding electrons divided by two

Answer 2

Bond order

Question 3

Molecular orbital located between two nuclei; electrons in a bonding orbital stabilize a molecule

Answer 3

Bonding orbital

Question 4

Orbitals that have the same energy

Answer 4

Degenerate orbitals

Question 5

Phenomenon in which a material is not magnetic itself but is repelled by a magnetic field; it occurs when there are only paired electrons present

Answer 5

Diamagnetism

Question 6

Technique for combining atomic orbitals to create molecular orbitals

Answer 6

Linear combination of atomic orbitals

Question 7

Change that causes σp orbitals to be less stable than πp orbitals due to the mixing of s and p-based molecular orbitals of similar energies.

Answer 7

S-p mixing

Question 8

Antibonding molecular orbital formed by out-of-phase overlap of atomic orbital along the axis of the bond, generating a node between the nuclei

Answer 8

σ* bonding orbital

Question 9

Molecular orbital in which the electron density is found along the axis of the bond

Answer 9

σ bonding orbital

Question 10

Antibonding molecular orbital formed by out of phase side-by-side overlap of atomic orbitals, in which the electron density is found on both sides of the internuclear axis, and there is a node between the nuclei

Answer 10

π* bonding orbital

Question 11

Molecular orbital formed by side-by-side overlap of atomic orbitals, in which the electron density is found on opposite sides of the internuclear axis

Answer 11

π bonding orbital

Question 12

Phenomenon in which a material is not magnetic itself but is attracted to a magnetic field; it occurs when there are unpaired electrons present

Answer 12

Paramagnetism

Question 13

Model that describes the behavior of electrons delocalized throughout a molecule in terms of the combination of atomic wave functions

Answer 13

Molecular orbital theory

Question 14

Visual representation of the relative energy levels of molecular orbitals

Answer 14

Molecular orbital diagram

Question 15

Region of space in which an electron has a high probability of being found in a molecule

Answer 15

Molecular orbital