Giant Ionic Lattice
Ionic compounds have a giant lattice structure of positive and negative ions, held in place by strong electrostatic attractionbetween the oppositely charged ions.
High melting point - requires a lot of energy to break bonds.
Conducts electricity when molten or aqueous - ions become mobile in solution so can carry electrical current.
Dissolves well in polar solvents - polar solvents, like water, attracts ions out of the lattice into solution
Here is an Example, NaCl.