Ionic compounds consist predominately of ionic bonds.
The greater the difference in electronegativity between the elements the more ionic the compound.
1. Crystalline solids with high melting and boiling points
2. Many are soluble in polar solvents (water)
3. Most are insoluble in nonpolar solvents (CCl4)
4. Molten compounds conduct electricity
5. Aqueous solutions conduct electricity
6. Usually a METAL and NONMETAL
Formula unit - the simplest unit of an ionic compound
Examples: NaCl Li2O Ca