The strict nature of the structure leads to the brittleness of ionic compounds.
This rigid structure also hinders electrical and thermal conductivity unless the compound is in a liquid state.
The crystalline structure’s strength also leads to high BP and MP since the compounds are attracted to each other.
The polar nature of water can separate the ions of the compound because of their origin ions. Not all ionic compounds are highly soluble in water.
When dissolved, they conduct electricity in solution because of the ions present.