New Book Chapter 5 Questions 1. In Mendeleev's first periodic table, he had to leave some blank spaces in order that elements wit similar properties would be placed in the same rows. What did these blank spaces indicate to him? 2. A) Name two elements that will unite with each other to form an ionic compound. B) Which one of the two elements becomes the positive ions in the compound and which one becomes the negative ions? 3. Name two elements that will unite with each other to form a molecular compound. 4. List physical properties characteristic of the metallic elements. 5. List chemical properties characteristic of the metallic elements. 6. Name several useful alloys. 7. List physical properties characteristic of the nonmetallic elements. 8. List chemical properties characteristic of the nonmetallic elements. 9. List two metallic elements that have similar properties. 10. Name a metallic element that reacts violently with water. 11. Write a balanced equation for the reaction of the element given in #10 with water. 12. Write a balanced equation for the combustion of hydrogen. 13. Give the formula of the following polyatomic ions. Be sure to indicate the charges. sulfate nitrate nitrite phosphate carbonate hydroxide ammonium 14. Which element in group 13 is widely used as a structural metal? 15. Name 3 allotropic forms of carbon. 16. What compound is the principal ingredient in natural gas? 17. Skip this one. 18. Write the name and draw the structure of the hydrocarbon used to make ethylene glycol, polyethylene, and PVC. 19. One of the monomers that is used to make polyesters is also used as a radiator antifreeze. Write the name and draw the structure of this compound. 20. Skip this one. 21. Skip this one 22. Which element in group 14 is most metallic in terms of its chemical and physical properties? 23. Which element in Group 14 is widely distributed in the crust of the Earth and is primarily associated with oxygen in its compounds? 24. What properties of carbon dioxide gas may possibly lead to global warming? 25. What vital role does nitrogen play in the atmosphere? 26. What vital role does oxygen play in the atmosphere? 27. Skip this one. 28. Write the formula of ammonia and give two uses and two of its properties. 29. Skip this one. 30. Name two substances that contain phosphorus and are found in living organisms. 31. Why is arsenic poisonous? 32. Which compound is found in all the following materials? oyster shells, coral, limestone, marble, pearls, TUMS 33. Which element in Group 13 in nonmetallic? 34. Which element is found in the compounds responsible for the odors of rotten eggs, skunk spray, onions, and garlic and in such compounds exhibits a valence of two? 35. Which halogen is found in PVC? 36. Which of the halogens is the most chemically active? 37. What is detrimental about CFCs? 38. What properties of argon and tungsten make them well suited for light bulbs? 39. Name a metallic element that will not react with water even over long periods of time. 40. Name a metallic element that is a liquid even at low temperatures. 41. Name an element which is used to coat steel in cans. 42. Name a compound of sulfur that is an oily liquid, is an acid, and is the industrial chemical produced in greatest quantity in industrialized countries. 43. Which metallic element is found in all the various types of steel? 44. Which transition element is found in complexes of hemoglobin and carries the oxygen in the blood in our arteries?