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Bonding III - Properties

Bonding III - Properties. 6. 5. 1. 2. 3. 4. 10. 6. 7. 8. 9. 15. 11. 12. 13. 14. 20. 16. 17. 18. 19. 21. 22. 1. What is an electric current ?. answer. A flow of electrons. 2. What is an electrical CONDUCTOR ?. answer.

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Bonding III - Properties

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  1. Bonding III - Properties 6 5 1 2 3 4 10 6 7 8 9 15 11 12 13 14 20 16 17 18 19 21 22 Calderglen High School

  2. 1. What is an electric current ? answer A flow of electrons Calderglen High School

  3. 2. What is an electrical CONDUCTOR ? answer A substance that allows electricity to pass through it Calderglen High School

  4. 3. What is an electrical INSULATOR ? answer A substance that does NOT allow electricity to pass through it Calderglen High School

  5. 4. What types of substances conduct electricity ? answer Metals Graphite (form of carbon) Molten ionic compounds Ionic solutions Calderglen High School

  6. 5. What types of substances do NOT conduct electricity ? answer Non – metals (except carbon Graphite) Solid ionic compounds Covalent compounds Calderglen High School

  7. answer 6. Complete the table? Yes Yes No Yes Yes No NoNo No No Calderglen High School

  8. answer 7. Fill in the typical melting points for these structures. (i.e. high, low, v. high etc) High High Low Very High Calderglen High School

  9. answer 8. Fill in the blanks to suggest structures. (e.g. Ionic, Covalent molecular, Metallic, Covalent network) Covalent Network Ionic Covalent Molecule Metallic Calderglen High School

  10. 9. What type of particle flows through metals during conduction? answer Delocalised Electrons Calderglen High School

  11. 10. How do metals conduct electricity ? answer Delocalised Electrons flow through the metal. Calderglen High School

  12. 11. Why do ionic solids NOT conduct electricity ? answer The ions are not free to move Calderglen High School

  13. 12. What type of structure is shown?Suggest a name Image: BBC website answer Covalent Network. e.g. Silicon dioxide Calderglen High School

  14. answer 13. What type of structure is shown? Suggest a name for a substance with this type of structure. O O O O O O O O O O C C C C C Covalent molecular e.g. carbon dioxide (CO2) Calderglen High School

  15. 14. Describe the structure of an IONIC solid answer An ionic solid consists of a network or LATTICE of oppositely charged ions Calderglen High School

  16. 15. Describe the electron arrangement of ions? answer The electron arrangement of a Noble gas atom. This means that they have a full outer energy level This electron arrangement is stable Calderglen High School

  17. Why do molten ionic compounds conduct but ionic solids do not ? answer The ions in the MOLTEN substance are FREE TO MOVE. The ions cannot move in a solid. Calderglen High School

  18. 17. Do ionic solids dissolve in water? answer YES .Most Ionic solids DISSOLVE in water. The lattice breaks up and the ions spread out. Calderglen High School

  19. 18. Which covalent compounds conduct electricity? answer NONE! Calderglen High School

  20. 19. What are the typical STATES of ionic and covalent compounds? answer All Ionic compounds are SOLIDS. Covalent compounds can be liquids, gases or solids with low melting points Calderglen High School

  21. answer 20. How strong are the bonds between molecules? How does this affect properties such as melting point? O O O O O O O O O O C C C C C The bonds between molecules are WEAK. This means that covalent molecules typically have low melting points. Calderglen High School

  22. 21. What type of structure is shown?Suggest a name Image: BBC website answer IONIC LATTICE e.g. Sodium chloride (any metal / non metal compound) Calderglen High School

  23. 22. What type of structure is shown?Suggest a name Image: BBC website answer Metallic e.g. Sodium, iron, copper…(any metal) Calderglen High School

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