Development of the Modern Freezer. Bacteria are usually the cause of food decay, but they can't grow as well or at all in freezing temperatures, which are at 32 degrees Fahrenheit (0 degrees Celsius) or lower.
HF- polar molecule: dipole-dipole forces. There are also dispersion forces and H bond between HF. BF3- nonpolar: dispersion forces. Ar- Dispersion forces between Ar atoms.
Bonding Intramolecular forces: Bonding within a molecule / structure (ionic, covalent, metallic) Intermolecular forces: between molecules (permanent. dipoles, hydrogen bonding, van der Waalâs forces) Ionic Bonding Ionic bond: electrostatic attraction between an ion and all the adjacent oppositely. Nearly always between metal and non-metal ions.