1. Hello. My name is Bond, Ionic Bond.

2. Ionic Bonds valence electrons: outer-most electrons that are used in bonding; electrons in the highest occupied energy level of an element’s atoms electron dot structures: diagrams that show valence electrons as dots

3. Electron Configurations for Cations Cations lose electrons The same rules apply as when assigning charges to cations and anions 1s 2s 3s 2p 3p 1s 2s 3s 2p 3p

4. Electron Configurations for Anions Anions gain electrons 1s 2s 3s 2p 3p 1s 2s 3s 2p 3p

5. Formation of Ionic Bonds ionic bond: the electrostatic attraction that binds oppositely charged ions together

6. Formation of Ionic Bonds

7. Na Cl Na + Cl - Formation of Ionic Bonds 1s 2 2s 2 2p 6 3s 1 1s 2 2s 2 2p 6 3s 2 3p 5 1s 2 2s 2 2p 6 1s 2 2s 2 2p 6 3s 2 3p 6

8. Formation of Ionic Bonds AlBr 3

9. Problems Use electron dot structures to predict the formulas of the ionic compounds formed from these elements potassium and oxygen magnesium and nitrogen

10. Answers

11. Properties of Ionic Compounds Crystalline solids (made of ions) High melting and boiling points. The strong attractions between the cations and the anions in ionic solids are responsible for their high melting points. For ionic compounds, melting points typically range from 300oC to 1000oC. Conduct electricity when melted in aqueous solution, an ionic compound dissociates into its ions. This means that when NaCl is dissolved in water, the solution contains Na+ ions and Cl- ions. The dissociated ions in aqueous solution gives the solution the ability to conduct electricity. Therefore, ionic compounds dissolved in water makes strong electrolytes. Electrolytes are substances that produce ions in aqueous solution; these electrolytes enable a solution to conduct an electric current. Ionic compounds and strong acids and bases are strong electrolytes.