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What is today about ?

Delve into the world of metals by understanding their structures, bonding properties, and unique characteristics. Learn how metallic bonding attributes to the properties of metals and discover why metals exhibit high melting points. Explore examples of metal properties, magnetic elements, and their usage in jewelry, along with the formation of metal crystals. Dive into the concept of metallic bonding with fixed metal ions and a sea of delocalized electrons. Uncover how this bonding model contributes to the ductility and malleability of metals.

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What is today about ?

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  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.

  6. 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.

  7. Properties

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

  9. Metallic Bonding Metallic Bonding

  10. Metallic Bonding Metallic Bonding

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

  12. 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. AgNO3 + Cu  Cu(NO3)2 + Ag

  13. Bonding Summary Bonding Summary

  14. Quiz Quiz

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