https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:properties-of-solids/v/ionic-solids 2022-09-11T01:04:41.009667842Z Ionic solids Ionic solids are composed of cations and anions held together by electrostatic forces. Due to the strength of these interactions, ionic solids tend to be hard, brittle and have high melting points. Ionic solids are poor conductors of electricity except when their ions are mobile, such as when a solid is melted or dissolved in solution. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/db6b08b1-0803-4bfa-9100-ed0b61776800_1280_720_base.png Ionic solids Ionic solids are composed of cations and anions held together by electrostatic forces. Due to the strength of these interactions, ionic solids tend to be hard, brittle and have high melting points. Ionic solids are poor conductors of electricity except when their ions are mobile, such as when a solid is melted or dissolved in solution. https://cdn.kastatic.org/ka-youtube-converted/zax0lYlOdiI.mp4/zax0lYlOdiI.mp4 455 Properties of ionic compounds