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.
Hydrofluoric acid (HF dissolved in water) is a bit more ionic and consists of hydrated HF molecules with some hydrated protons (hydronium ions, HâOâºÂ¹) and fluoride ions, (Fâ»Â¹). Reality is always a bit more complicated than the theory.onic bonds are generally between a metal and a nonmetal. When determining whether a bond is covalent or ionic I usually check to see if it is between a metal and a nonmetal or two nonmetals.