1 / 21

Properties of Substances

Properties of Substances. 7. 5. 1. 2. 3. 4. 10. 6. 7. 8. 9. 15. 11. 12. 13. 14. 20. 16. 17. 18. 19. 1. What is an electric current ?. answer. A flow of electrons. 2. What is an electrical CONDUCTOR ?. answer. A substance that allows electricity to pass through it.

qamra
Download Presentation

Properties of Substances

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Properties of Substances 7 5 1 2 3 4 10 6 7 8 9 15 11 12 13 14 20 16 17 18 19 mmcl2003

  2. 1. What is an electric current ? answer A flow of electrons mmcl2003

  3. 2. What is an electrical CONDUCTOR ? answer A substance that allows electricity to pass through it mmcl2003

  4. 3. What is an electrical INSULATOR ? answer A substance that does NOT allow electricity to pass through it mmcl2003

  5. 4. What types of substances conduct electricity ? answer Metals Graphite (a form of carbon) Molten ionic compounds Solutions of ionic compunds mmcl2003

  6. 5. What types of substances do NOT conduct electricity ? answer Non - metals Solid ionic compounds Covalent compounds mmcl2003

  7. 6. What are electrolytes ? answer Ionic compounds that conduct electricity (The compound decomposes) mmcl2003

  8. 7. Describe how electrolytes conduct electricity? answer The movement of ions to electrodes mmcl2003

  9. 8. What type of particle flows through electrolytes during conduction? answer Ions mmcl2003

  10. 9. What type of particle flows through metals during conduction? answer Electrons mmcl2003

  11. 10. How do metals conduct electricity ? answer Electrons flow through the metal. The metal does NOT change chemically mmcl2003

  12. 11. Why do ionic solids NOT conduct electricity ? answer The ions are not free to move mmcl2003

  13. 12. What happens to the POSITIVE ions when an electrolyte conducts? answer The positive ions are attracted to the negative electrode. Here they GAIN electrons. This changes them into ATOMS. eg Cu2+ + 2e  Cu mmcl2003

  14. 13. What happens to the NEGATIVE ions when an electrolyte conducts? answer The negative ions are attracted to the positve electrode. Here they LOSE electrons. This changes them into ATOMS which can join to form molecules. eg 2Cl- Cl2+ 2e mmcl2003

  15. 14. Describe the structure of an IONIC solid answer An ionic solid consists of a network or LATTICE of oppositely charged ions mmcl2003

  16. 15. Describe the electron arrangement of ions? answer The electron arrangement of a Noble gas atom. This electron arrangement is stable mmcl2003

  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. mmcl2003

  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. mmcl2003

  19. 18. Which covalent compounds conduct electricity? answer NONE! mmcl2003

  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 mmcl2003

  21. 20. What are the products of the electrolysis of copper chloride? answer COPPER metal at the negative electrode and CHLORINE gas at the positive electrode. mmcl2003

More Related