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  • Demo is to place a piece of copper in magnesium sulphate, then a piece of magnesium in copper sulphateUse huge beakers and pieces of metal to aid visibilityExplain how a reaction shows that Mg has displaced the Cu from the sulphateTalk about why the Mg displaces the Cu, but not the other way roundBe quick – the practical takes most of the lesson!
  • Remind several times how to spot a reaction – it’s the colour difference (versus the water drop)
  • An alternative to 4.14 could be to set light toballoons of H and He. The He will still burst (because of the pressure) but not as loudly as H!
  • Transcript

    • 1. Chemistry 4: Groups in the periodic table EDEXCEL CHEMISTRY C2 LESSONS
    • 2. General You should be able to match each lesson’s objectives to your Spec sheet On these sheets label the date we attempt each objective During revision you can use your spec sheet like an index, to go straight to a particular piece of work My colour coding • Red – Low level (state, identify) Cover this quickly and progress onto… • Amber – D-C level (describe, calculate, classify) For most of you this is your currently working at level • Green – C-B level (Explain, analyse) For most of you this is a target level
    • 3. 4.1 Classify elements 4.2 Describe the structure of metals 4.3 Explain malleability and conduction Lesson 1 Objectives
    • 4. Elements Colour-code your periodic table to show • Alkali metals • Noble gases • Halogens • Transition metals Predict the category for the following elements Element A) Unreactive, clear gas Element B) Highly reactive, coloured, poisonous gas Element C) Soft metal that explodes when added to water 4.1 Classify elements Info: Milner Page 121
    • 5. Quiz Name an element that is… 1. A transition metal 2. An alkali metal 3. A metal that is not transition or alkali 4. A halogen 5. A noble gas 6. A non-metal that is not a halogen or a noble gas
    • 6. Structure of metals Read the information on page 129 of the Milner Chemistry book Answer question 5 Draw a labelled diagram of the structure of a metal. Include • Positive ions • Sea of delocalised electrons 4.2 Describe the structure of metals
    • 7. Properties Define what a conductor is Define what a malleable material is Watch the animation about metallic bonding • Malleability (3min) Conductivity (6min) • http://www.youtube.com/watch?v=Bjf9gMDP47s Write an explanation of why metals can be shaped without breaking 4.3 Explain malleability and conduction
    • 8. 4.4 Recall properties of transition metals 4.5 Classify elements and compounds according to their bonding Explain properties of substances using ideas about bonding Lesson 2 Objectives
    • 9. Transition metals Use your periodic table to find: • How many metals overall • How many of these are transition metals • Is iron or lead a transition metal? Practical 1 : Heat the iron pieces, then the lead pieces What does this tell us about the melting points of transition metals? Practical 2: Record the colours of the transition compounds and the non-transition compounds What does this tell us about the compounds of transition metals ? What can we say about compounds of other metals? 4.4 Recall properties of transition metals
    • 10. Bonding View the page about bonding http://www.bbc.co.uk/bitesize/higher/chemistry/energy/ bsp/revision/3/ Using the book page 140-2, produce a diagram of • Ionic bonding • Simple molecular covalent • Giant molecular covalent • (You also need to know metallic bonding from last lesson) Write the following substances next to the correct bonding type • Diamond Ammonia Sodium Chloride Aluminium 4.5 Classify elements and compounds according to their bonding
    • 11. Bonding of substances Write why: Molecular substances have a low melting point Giant structures have a high melting point Metals are good conductors You must explain why the type of bonding lattice leads to the property mentioned 4.5 Explain properties of substances using ideas about bonding
    • 12. 4.6 State properties of alkali metals 4.7 Describe the reactions of lithium, sodium and potassium with water 4.8 Describe the pattern in reactivity of the alkali metals and use this pattern to predict the reactivity of other alkali metals Lesson 3 Objectives
    • 13. Alkali metals STARTER: Where can Li, Na, K, Rb, Cs, Fr be found on the Periodic Table? Observe the alkali metals Choose which of the following properties best apply to alkali metals Hard/soft, shiny/dull, strong/weak, low/high melting point, reactive/unreactive Extension: Choose some more words which describe alkali metals 4.6 State properties of alkali metals
    • 14. Patterns Observe the demo of alkali metals in water Write a few sentences what happens in the reactions Write a word equation for each reaction 4.7 Describe the reactions of lithium, sodium and potassium with water 4.8 Describe the pattern in reactivity of the alkali metals and use this pattern to predict the reactivity of other alkali metals Describe what differences there are as you go down group 1. Predict what would happen if you added water to a) Rubidium b) Caesium Watch the video and see if you were correct
    • 15. 4.9 Recall the colours and states of the halogens at room temperature 4.11 Describe how halogens react with hydrogen 4.10 Describe the reaction of halogens & metals Lesson 4 Objectives
    • 16. Halogens Watch the first part of the video OR look at the info on p112 Complete a table for the halogens Extension: Complete the questions 1-4 on p112 Learning check: Test your partner by saying a NAME, COLOUR or STATE. They have to provide the other two pieces of info 4.9 Recall the colours and states of the halogens at room temperature Halogen Colour State at room temperature
    • 17. Hydrogen Watch the next part of the video. Name what is produced when hydrogen reacts with • Fluorine • Chlorine • Bromine • Iodine Describe the general name for all of the salts that are produced by hydrogen+halogens Learning check: Write a word equation for hydrogen reacting with chlorine 4.11 Describe how halogens react with hydrogen
    • 18. Metals Watch the final part of the video Describe what is produced when aluminium reacts with each halogen Describe the general name for the substances produced when metals react with halogens Extension: Complete the questions 5-10 on p113 Learning check: write a word equation to show aluminium reacting with iodine 4.10 Describe the reaction of halogens & metals
    • 19. Describe how a displacement reaction occurs 4.12 Investigate displacement reactions of halogens with halide ions in solution 4.13 Explain the relative reactivity of the halogens as shown by their displacement reactions with halide ions in solution Lesson 5 Objectives
    • 20. Displacement Watch the demos Explain why Magnesium + Copper Sulphate reacted but not Copper + Magnesium Sulphate Describe how a displacement reaction occurs SO4CuMg
    • 21. Investigation Use the grid to organise your spotting tile You are to react every possible combination of the three halogens and three halide salts You must use small amounts (One droplet each, not a full pipette) To see if there has been a reaction you must compare the colour with the water drop. There has only been a reaction if there is a difference in colour compared with the water drop 4.12 Investigate displacement reactions of halogens with halide ions in solution
    • 22. Conclusion Work out which halogens displaced halides by looking for colour changes If halogen A displaces halide B, the halogen A is more reactive than halide B Decide the order of reactivity from most to least reactive Write a paragraph explaining how your observations support your decision 4.13 Explain the relative reactivity of the halogens as shown by their displacement reactions with halide ions in solution
    • 23. 4.14 Recall the noble gases are inert 4.15 Describe the discovery of the noble gases Explain how the electronic arrangements in their atoms cause noble gases to be inert Noble Gases
    • 24. 4.14 Recall the noble gases are inert Complete q’s on p111 4.15 Describe the discovery of the noble gases Read the information on the sheet and write a summary paragraph (5 to 8 sentences). Before you write, highlight the key points so you know what information to choose Explain how the electronic arrangements in their atoms cause noble gases to be inert Complete question 4 on page 127 Draw a diagram of Argon. Write an explanation why it doesn’t react with other atoms. Include the keywords electrons and energy levels Noble Gases
    • 25. Describe uses of noble gases 4.16 Relate the uses of the noble gases to their properties 4.17 Analyse trends in the properties of the noble gases Lesson 7 Objectives
    • 26. On your miniboards list four uses of noble gases Extension: link which noble gas to each use Describe uses of noble gases 4.16 Relate the uses of the noble gases to their properties Explain what properties of Helium make it suitable for use in airships “Helium is useful in airships because…” Explain what properties of Argon make it suitable for filling light bulbs
    • 27. Trends Look carefully at the data on noble gases Select one property that you think may show a trend Create a table of data Plot the data on a graph Write a conclusion which describes the trend on the graph. Suggest a reason for the trend 4.17 Analyse trends in the properties of the noble gases Gas (Property) He 23.4 Ne 24.3 Ar 12.2 Kr 19.3 Xe 43.2 Rn 20.9
    • 28. Revision 1 Give the number or name (or both) of the group… a. Lithium b. Bromine c. Iron d. Sodium e. Argon f. Fluorine g. Rubidium h. Copper i. Iodine j. Xenon
    • 29. Revision 2 Use the properties to identify each element (1/2 a mark for correctly stating its group) 1. I burn when placed in water. I am a soft metal, but not as soft as Sodium. 2. I am a colourless gas that reacts with hardly anything else. When electricity passes through me I glow red 3. When I make compounds, they are brightly coloured. I am a brown, shiny metal with a high melting point 4. When aluminium is placed in me, it reacts to form a metal halide. I am an orange liquid at room temperature.
    • 30. Revision 3 Shown is a part of the Periodic Table 1. Name elements X and Y 2. Name the group that X belongs to, and that of Y 3. Describe the reactivity of Y 4. Describe the reactivity of X compared with another named element 5. Sulfur has an atomic number of 16 (Each atom has 16 protons). What is the atomic number of Argon? Explain how you worked it out Oxygen Fluorine Neon Sulfur Chlorine Argon Selenium X Y
    • 31. Revision 4 A diagram of metallic bonding is shown 1. Explain why metals are malleable (can be bent without breaking) 2. Explain how metals conduct electricity