Desribe the balance of interactions which leads to the stability of the hydrogen molecule.

Describe the bonding of the sodium chloride molecule.

What kind of interactions lead to vibrational spectra? What information can be obtained from vibrational frequencies (typically in the infrared region)?

What kind of information can be obtained from rotational spectra (typically in the microwave region)?

What kind of molecular structure information can be obtained from a vibration-rotation spectrum?