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29 Cards in this Set
- Front
- Back
1. Where will you find the transition metals on the periodic table? |
• In the central block of the periodic table |
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2. List 5 properties of metals. |
• Conduct Heat • Conduct Electricity • Most are solids at room temperature • Can be bent into shape-malleable • Can be pulled into wires-ductile |
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3. Where do we get the metals that we use? |
• The Earth’s crust |
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4. How do we get the metals? |
• Mining or quarrying |
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5. What is an environmental impact of quarrying? |
• Damage to the habitats of animals • Production of pollutant gases by plant traffic. |
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6. What is an economic impact of quarrying? |
• Provides jobs for the local community |
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7. What is a social impact of quarrying? |
• Jobs |
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8. How is the metal usually found in the earth’s crust? |
• In the form of an ORE |
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9. What is an ORE? |
• A rock that contains enough metal to make it worth extracting. |
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10. The method of extracting the metal depends on what? |
• The reactivity of the metal. |
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11. Name 3 metals that are found in the earth’s crust as the metal themselves (in their native state). |
• Gold • Silver • Platinum |
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12. How do we extract metals from their ores that are less reactive than carbon? |
• Heat them with carbon. |
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13. How are metals that are more reactive than carbon extracted? |
• Electrolysis |
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14. How are metals extracted using electrolysis? |
• Passing an electric current through the molten ORE |
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15. What metals are extracted by electrolysis? |
• Aluminium and Titanium |
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16. Why is this process expensive? |
• Many steps in the process • Lots of energy used |
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17. What are the key properties of aluminium and titanium that make them useful for aircraft? |
• Both have low density (light) • Both have very high melting points. |
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18. What is copper used for? |
• Used in water pipes • Construction • Electrical cables |
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19. Name three ways in which copper is extracted? |
• Heating the ore in a furnace (smelting) then purification by electrolysis • Phytomining • Bioleaching |
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20. What are the steps involved in phytomining? |
• Grow plants on areas of low grade ore • Plants absorb the copper ions • Burn the plants • React the ash with Sulphuric aopper via electrolysis or displacement using scrap iron |
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21. What is Bioleaching? |
• Bacteria absorb copper compounds and form solutions called leachate |
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22. Why are we now extracting copper from low grade ores? |
• Copper is in high demand • We are running out of higher grade ores • The new techniques have been developed |
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23. Why is iron be used to displace copper from solutions containing copper? |
• It is more reactive |
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24. Why are pure metals soft? |
• It contains atoms that are all of the same size • They can easily slide over one another. |
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25. What is an alloy? |
• A mixture of a metal with other elements |
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26. What is the benefit of an alloy? |
• Stronger • Resistant to corrosion |
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27. What are the names of the alloys of Iron? |
• Low carbon steel – easily shaped • High carbon steel – hard • Stainless steel – resistant to corrosion |
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28. Why does iron from the blast furnace have limited uses? |
• It contains about 96% iron and is brittle |
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29. Why is it a good idea to recycle metals? |
• Conserves limited resources • Uses less energy |