Here's why:
* Crystalline Structure: Ionic compounds form a rigid, ordered crystalline structure. The strong electrostatic forces between positively and negatively charged ions hold the structure together tightly.
* Brittleness: When force is applied to an ionic crystal, the layers of ions can easily slide past each other. This disrupts the electrostatic attractions, causing the crystal to fracture easily.
* High Melting and Boiling Points: The strong electrostatic forces between ions require a lot of energy to overcome. This means that ionic compounds have high melting and boiling points.
Let me know if you have any other questions!