Section: Module 6: Metals & Non-Metals | Eswatini Grade 9 Science | NJCTL

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Module 5: Acids, Bases & Salts
Module 7: Chemical Reactions

Module 6: Metals & Non-Metals

  • Module 6: Metals & Non-Metals


    In this module we will learn about metals and non-metals. 



    Be sure to complete the short answer assignment, the lab, the Mastery Exercises, and the module exam. Watch the videos and complete the practice problems to facilitate your learning. 

     Short Answer Assignment responses should be at least 200-300 words and referenced. Refer to the Required/Recommended reading materials or provide an additional reference to an article of your choice.

    1. Describe the general physical properties of metals in terms of lustre, malleability, ductility, sonority, electrical and heat conductivity.
    2. Investigate and place in order of reactivity: calcium, copper, iron, magnesium and zinc by reference to the reactions, if any and where relevant, of the metals with dilute hydrochloric acid (word equations required for reactions with dilute hydrochloric acid only).
    3. Describe the ease in obtaining metals from their ores by relating the elements to the reactivity series.
    4. Name metals that occur in pure state: copper and gold.
    5. Name the main ores of aluminium and iron.
    6. Define oxidation and reduction in terms of oxygen gain/loss only using the reaction of copper(II) oxide with hydrogen gas.
    7. Describe the essential reaction in the extraction of iron (reduction of iron (III) oxide).Include a word equation for the reaction. (details of blast furnace not required).
    8. Define an alloy as a mixture of two or more metals or a metal and a non metal.
    9. List the elements that make up the alloys: mild steel, stainless steel and brass.
    10. Describe the idea of changing the properties of iron by the controlled use of additives to form steel alloys, ie, mild steel and stainless steel only.
    11. Name the uses of mild steel (car bodies and machinery) and stainless steel (chemical plant and cutlery).
    12. Name the uses of zinc for galvanizing and for making brass.
    13. Name the uses of copper (electrical wiring and in cooking utensils) and aluminium (aircraft bodies and food containers), relating them to their properties.
    14. Describe the differences between general physical properties of metals and non-metals.
    15. Describe the approximate composition of air (21 % oxygen, 0.03% carbon dioxide, 78% nitrogen, and remainder being mixture of noble gases and water vapour).
    16. Prepare and collect hydrogen using a reactive metal and an acid.
    17. Describe the properties of hydrogen.
    18. Describe the test for hydrogen using a lighted splint.
    19. State the use of hydrogen as a fuel in rockets.
    20. Prepare and collect oxygen by the method of heating potassium permanganate.
    21. Describe the properties oxygen.
    22. Describe the test for oxygen using a glowing splint.
    23. State the uses of oxygen including its use in hospitals and with acetylene in welding.
    24. Investigate combustion using magnesium and fuels made up of carbon elements only. Include word equations for: • the formation of carbon dioxide from carbon and oxygen • the formation of magnesium oxide from magnesium and oxygen.
    25. Investigate the conditions (oxygen and water) necessary for rusting to occur.
    26. Describe methods of rust prevention: paint and other coatings (including zinc) to exclude oxygen.
    27. Prepare and collect carbon dioxide. 
    28. Describe the properties of carbon dioxide.
    29. Describe the test for carbon dioxide using lime water.
    30. State the uses of carbon dioxide in fire extinguishers, fizzy drinks and baking.
    31. List physical properties of water: melting point, boiling point and density.
    32. Investigate the physical properties of water: melting point and boiling point in terms of the temperature changes.

          There are no required readings.

          • Module 4 Topics

          • Module 4 Module Review

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        Module 5: Acids, Bases & Salts
        Module 7: Chemical Reactions