2. BONDING The joining together of elements in order to fill their outer shells. CH 4

3. 3 basic types of bonds Ionic Covalent Metallic

4. compound types ionic compounds Metal /non-metal (+) (-) charges IONIC BONDS CONDUCTS electricity (when dissolved or melted) usually SOLID at room temperature HIGH melting & boiling points molecular compounds non-metals SHARE electrons (no charges) COVALENT BONDS NOT CONDUCTIVE usually LIQUID or GAS at room temperature LOW melting & boiling points

5. Ionic Bond Between atoms of metals and nonmetals with very different electronegativity Bond formed by transfer of electrons from one atom to another (CHARGES FORM) Produce charged ions all states. Examples; NaCl, CaCl 2, K 2 O METAL + NON-METAL Contain charges

7. Ionic Bonds: One Big Greedy Thief Dog!

8. DETERMINING IONIC FORMULAS Metal written 1 st Non-metals written 2 nd Determine charges If charges not equal and opposite CRISS- CROSS the numbers (not the charges Sodium chloride Na Cl Calcium oxide Ca O Potassium sulfide K S Calcium nitride Ca N

9. COVALENT BOND bond formed by the sharing of electrons NO CHARGES!!!

10. Covalent Bond Formed by sharing electron pairs When NON-METAL joins with another NON-METAL. Non-metal + non-metal Examples; O 2, CO 2, C 2 H 6, H 2 O, SiC

12. Ionic vs. Covalent? complete e- dot symbols CaCl 2 (I or C)SO 2 (I or C) CO 2 (I or C)Al 2 O 3 (I or C) FeCl 3 (I or C)Na 2 O(I or C)

13. Determine the proper formula for each of the following ionic compounds Ca OAl S K ONa Cl B OSr F Li SAl P

14. General Chemistry – Unit 6 Worksheet 3 Electron-Dot Diagrams Part 1 Use electron dot symbols to represent the formation of the stable ionic compounds from neutral atoms. 1.K and I2. Sr and F 3.Na and S4. Al and Cl

15. Part 2 Draw electron dot diagrams for the following covalent molecules. 5.Br26. NF3 7.CH48. HOF 9.H2O210. N2H4 11.C2H412. N2