Final answer:
Ionic compounds have crystal shape, high melting points, and electrical conductivity.
Step-by-step explanation:
Yes, the statement is true. Ionic compounds have several characteristic properties, including crystal shape, high melting points, and electrical conductivity. The crystal shape of ionic compounds is due to their arrangement of ions in a repeating pattern. They form a regular three-dimensional lattice structure, resulting in distinct crystal shapes. Ionic compounds also have high melting points because of the strong electrostatic attractions between the positively charged cations and negatively charged anions. These electrostatic forces must be overcome to break the ionic bonds and allow the compound to melt.
Regarding electrical conductivity, ionic compounds are poor conductors in the solid state because the ions are fixed in their positions and cannot move. However, when an ionic compound is dissolved in water or melted, the ions become free to move and can carry an electric current. This is because the flow of charged particles, or ions, is necessary for electrical conductivity.