1. Bonds… (Not James…)

2. Review O Covalent bonds O Share outermost electrons

3. Review O Ionic bonds O Opposite charges attract O Each element will change their number of electrons

4. Ions O Cation O Anion

5. Metallic Bonds O Metallic cation is held by “Free” electrons

6. Metal Properties O Melting and Boiling points O Malleability O Hardness O Strength O Thermal conductivity O Electrical conductivity

7. Metallic Alloys O An alloy is a mixture of elements that has metallic properties.

8. Alloys O Brass O Bronze O Cast Iron O 18-carat Gold O Pewter O Steel O Sterling Silver Page 228

9. Balancing Formulas O Charty Dude #9 will help… O Page 218 and 219 will also help…

10. Balancing Formulas O Find the charge for each material O Add up the charges O If the total ≠ 0, add a subscript multiplier to get the total to “0” O Recheck

11. Balancing Formulas O K O O Mg Cl O Na N O Al P O Si F O K 2 O O Mg Cl 2 O Na 3 N O Al P O Si F 4

12. Balancing Formulas O Ag S O Ni I O Zn P O C At O Mn P O Ag 2 S O Ni I 2 O Zn 3 P 2 O C At 4 O Mn P O Mn 3 P 2

13. Balancing Formulas