Slide 1

Pauli principle

Slide 2

Wolfgang Pauli and Niels Bohr study spin

Slide 3

Slide 4

Slide 5

l = 1 S = 0

Slide 6

l = 1 S = 0

Slide 7

Slide 8

Slide 9

Slide 10

H2H2

Slide 11

Slide 12

H2H2

Slide 13

He 2

Slide 14

He 2 + ion.

Slide 15

H 2 + ion

Slide 16

H 2 - ion

Slide 17

The relative sizes of the lithium 1s and 2s atomic orbitals

Slide 18

Li 2

Slide 19

The three mutually perpendicular 2p orbitals on tow adjacent boron atoms.

Slide 20

The two p oribitals on the boron atom that overlap head-on combine to form bonding and antibonding orbitals.

Slide 21

The expected MO energy-level diagram for the combination of the 2 P orbitals on two boron atoms.

Slide 22

The expected MO energy-level diagram for the B 2 molecule

Slide 23

The correct MO energy-level diagram for the B 2 molecule.

Slide 24

The MO energy-level diagrams, bond orders, bond energies, and bond lengths for the diatomic molecules, B 2 through F 2.

Slide 25

An apparatus used to measure the paramagnetism of a sample

Slide 26

When liquid oxygen is poured into the space between the poles of a strong magnet, it remains there until it boils away. Source: Donald Clegg

Slide 27

The MO energy-level diagram for the NO molecule

Slide 28

The MO energy-level diagram for both the NO+ and CN- ions

Slide 29

A partial MO energy-level diagram for the HF molecule

Slide 30

The electron probability distribution in the bonding MO of the HF molecule

Slide 31

Slide 32

Slide 33

Slide 34

Slide 35

Slide 36

+

Slide 37

Slide 38

Slide 39