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

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

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

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

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

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

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

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

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

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

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

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

15. mmcl2003 13.What happens to the NEGATIVE ions when an electrolyte conducts? 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 -  Cl 2 + 2e answer

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

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

18. mmcl2003 16.Why do molten ionic compounds conduct but ionic solids do not ? The ions in the MOLTEN substance are FREE TO MOVE. The ions cannot move in a solid. answer

19. mmcl2003 17.Do ionic solids dissolve in water ? YES.Most Ionic solids DISSOLVE in water. The lattice breaks up and the ions spread out. answer

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

21. mmcl2003 19. What are the typical STATES of ionic and covalent compounds ? All Ionic compounds are SOLIDS. Covalent compounds can be liquids, gases or solids with low melting points answer

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