1. What is today about ?

2. METAL LO: Describe the structure of metals (D)
Explain how metals form bonds (C)
Explain why the properties of a metal occur (B)
Use the model of metallic bonding to account for the properties of metals (A/A*)
Starter
Do metals have high or low melting points ?
What does this tell you about the bonding of the atoms ?

3. 5, 4, 3, 2, 1 Metal symbols Metal properties Magnetic elements
Metals used in jewellery
1 Metal that is liquid at room temperature

4. Metal / Non-metal = Ionic
Non-metal / Non-metal = Covalent
Metal / Metal = Metallic

5. Metal crystals Metals are made of grains.
These grains order themselves to form metal crystals.
Steel dipped in zinc is galvanised steel and the crystals are clearly visible.

7. Metallic Bonding Fixed metal ions Sea of delocalised electrons
More electrons in the outer shell = More electrons in the sea
This makes the bond even stronger.
The metals will have a higher melting point.

8. Properties

9. Properties Conduct electricity Conduct heat Shiny appearance Malleable
Ductile
Sonorous

10. Metallic Bonding
Metallic Bonding

11. Metallic Bonding
Metallic Bonding

12. Metals are ductile and malleable because the metal ions are free to slide on each other in the sea of delocalised electrons.

13. Growing Silver Crystals
A coil of copper wire is placed into a solution of silver nitrate.
The copper displaces the silver.
The silver crystals grown on the wire.
AgNO Cu  Cu(NO3) Ag

14. Bonding Summary
Bonding Summary

15. Quiz
Quiz