1. electrons
   1. gain
   2. loss
   3. complete outer energy levels
   4. metals
      1. loose electrons
         1. positive ions
            1. cations
   5. none metals
      1. gain electrons
         1. negative ions
            1. anions
2. electrostatic forces
   1. hold ions
      1. attraction
   2. strong
   3. IONIC BOND
3. electron configuration
   1. Li+ 2
   2. Na+ 2.8
   3. Mg2+ 2.8
   4. F- 2.8
   5. Cl- 2.8.8
   6. O2- 2.8
      1. oxygen reduce
         1. addition of electrons
      2. oxide ion
4. Properties
   1. high melting points
   2. high boiling points
   3. electrolytes
      1. conduct
         1. dissolved in water
         2. molten
         3. ions free to move
         4. if insoluble
            1. barium sulphate
            2. conduct when molten only
   4. strong electrostatic forces
5. giant lattice structures
   1. ions NOT free to move
      1. crystals
6. Magnesium Oxide
   1. higher melting & boiling point than NaCl
   2. stronger ionic bonds 2+
   3. ionic formula Mg2+O2-
7. sodium chloride
   1. 6 sodium ions around a chloride ion
   2. 6 chloride ions around 1 sodium ion
   3. hard crystal
      1. strong forces between ions
   4. high melting point
      1. 801C
      2. strong forces
   5. Dissolves in water
      1. electrostatic attraction with water
   6. Insulator when solid
      1. strong forces = ions held
   7. conductor
      1. molten
      2. dissolved
8. DOT-AND-CROSS DIAGRAMS
   1. MgO
      1. Mg loose 2e
      2. O gain 2e
   2. AlF3
      1. Al loose 3e
      2. 3 F gain 1e each