What are three properties of ionic compounds?

1) High Melting and Boiling Points. Ionic Compounds and bonded together by strong Ionic Bond. This results in a very strong bond requiring a lot of energy (in the form of heat energy) to overcome. Thus causing High Melting and Boiling points.

2) Conducts electricity in liquid state and in molten state. Ionic Compounds have a Crystal Latice Structure which causes their ions to be at fixed points thus making them unable to conduct electricity when in solid state. However when in liquid state or in molten state, Ions can move freely and thus they can conduct electricity in those two states.

3) Soluble in water but not soluble in organic solvent such as oil.