1. Chemistry 2 Lesson 1.6 Metallic Bonding AQA Additional Science

2. Aims Class work Bonds in Metals LO’s How do metals bond? Write it down!! Page 46 © C Meyer

3. All Know how atoms in metals are arranged Most List elements with giant metallic structures Some Explain how delocalised electrons hold metal atoms together Aims

4. In back List 5 metal symbols List 4 metal properties List 3 magnetic metals List 2 metals used in jewellery List 1 liquid metal at room temperature How do metals bond?

5. Growing metal crystals Expt 1 Take a boiling tube Quarter fill with silver nitrate solution Place a strip of copper wire in the solution Expt 2 Take another boiling tube Quarter fill with lead nitrate Place a strip of zinc foil in the solution Leave until end of lesson and observe crystals with hand lens SAFETY Chemicals - goggles 10 mins How do metals bond?

6. Tidy UP!!! Stack items tidily Clean up bench/floor Sit down when finished

7. Metals grow as crystals (grains) How do metals bond?

8. Metal atoms form a giant lattice similar to ionic compounds. Grains grow with atoms coming together in ordered patterns m1

9. Types of bonding Atoms can be joined together in 3 possible ways All three types involve changes in the electrons in the outermost electron shells of the atoms Ionic Bonding Metal and non-metal Covalent Bonding Non-metals only Metallic Bonding Metals only

10. Outer electrons are free to move all over the lattice in a “sea of electrons” (delocalised). This leaves metal atoms with a + charge. Attraction between - and + acts like a glue How do metals bond? m1

11. What have I learnt?

12. What type of bonding will the substances have? SubstanceBonding Brass (Alloy copper + zinc) Copper oxide Sulphur dioxide Iron Sodium fluoride Nitrogen chloride Metallic Ionic Covalent Metallic Ionic Covalent What have I learnt?

13. Which of the following will have covalent bonding? A. Sodium chloride B. Iron C. Bronze D. Nitrogen dioxide What have I learnt?

14. Which of the following will have metallic bonding? A. Copper chloride B. Graphite C. Bronze D. Phosphorus chloride What have I learnt?

15. Which is a true statement about covalent bonds? A. Usually formed between metals and non- metals B. Involve transfer of electrons between atoms. C. Form full electron shells by sharing of electrons. D. Always involve 2 electrons per atom. What have I learnt?

16. Which of the following exists as a giant molecular structure? A. Water B. Carbon dioxide C. Sodium chloride D. Diamond What have I learnt?

17. What will be the formula of the compound formed by hydrogen and sulphur? A.HS B.H 2 S C.HS 2 D.H 2 S 2 32 S 16 1H11H1 1 2.8.6 What have I learnt?

18. Next lesson end of section test Prepare a spider diagram/mind map of all the key facts from this section Finish for homework and revise How do metals bond? Homework

19. The End