Grouping the Elements<br />Chapter 5.2<br />
Objectives:<br />Explain why elements in a group often have similar properties.<br />Describe the properties of the elemen...
Group 1: Alkali Metals<br /><ul><li>Alkali metals are elements in Group 1 of the periodic table. Alkali metal properties:
 group contains metals
 1 electron in the outer level
 very reactive
	softness
color of silver
shininess
low density</li></li></ul><li>Group 2: Alkaline-Earth Metals<br /><ul><li>Alkaline-earth metals are elements in Group 2.
Alkaline-earth metal properties:
group contains metals
 2 electrons in the outer level
 very reactive, but less reactive than alkali metals
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Physical science 5.2 : Grouping Of Elements

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Physical science 5.2 : Grouping Of Elements

  1. 1. Grouping the Elements<br />Chapter 5.2<br />
  2. 2. Objectives:<br />Explain why elements in a group often have similar properties.<br />Describe the properties of the elements in the groups of the periodic table.<br />
  3. 3. Group 1: Alkali Metals<br /><ul><li>Alkali metals are elements in Group 1 of the periodic table. Alkali metal properties:
  4. 4. group contains metals
  5. 5. 1 electron in the outer level
  6. 6. very reactive
  7. 7. softness
  8. 8. color of silver
  9. 9. shininess
  10. 10. low density</li></li></ul><li>Group 2: Alkaline-Earth Metals<br /><ul><li>Alkaline-earth metals are elements in Group 2.
  11. 11. Alkaline-earth metal properties:
  12. 12. group contains metals
  13. 13. 2 electrons in the outer level
  14. 14. very reactive, but less reactive than alkali metals
  15. 15. color of silver, higher densities than alkali metals</li></li></ul><li>Group 3–12: Transition Metals<br /><ul><li>Transition metals are inGroups 3–12. Some of the transition metals are shown below.</li></ul>Au<br />Zn<br />Cu<br />Hg<br />
  16. 16. Group 3–12: Transition Metals<br /><ul><li>Properties of Transition Metalsvary widely but include:
  17. 17. groups contains metals
  18. 18. 1 or 2 electrons in the outer level
  19. 19. less reactive than alkaline-earth metals
  20. 20. shininess, good conductors of electric current and thermal energy</li></li></ul><li>Lanthanides and Actinides<br /><ul><li>Some transition metals from Periods 6 and 7 appear in two rows at the bottom of the periodic table. Elements in the first row are called lanthanides and elements in the second row are called actinides.</li></li></ul><li>Group 13: Boron Group<br /><ul><li>Aluminum is the most common element from Group 13.
  21. 21. Group 13 properties:
  22. 22. group contains one metalloid and five metals
  23. 23. 3 electrons in the outer level
  24. 24. reactive
  25. 25. solids at room temperature</li></ul>B<br />Ga<br />Al<br />In<br />
  26. 26. Group 14: Carbon Group<br /><ul><li>Group 14 properties:
  27. 27. group contains one nonmetal, two metalloids, and two metals
  28. 28. 4 electrons in the outer level
  29. 29. reactivity varies among the elements
  30. 30. solids at room temperature</li></ul> C<br />Ge<br />Pb<br />Sn<br />Si<br />
  31. 31. Group 15: Nitrogen Group<br />Group 15 properties:<br /><ul><li>group contains two nonmetals, two metalloids, and two metals
  32. 32. 5 electrons in the outer level
  33. 33. reactivity varies among the elements
  34. 34. solids at room temperature (except for nitrogen, which is a gas)</li></li></ul><li>Group 16: Oxygen Group<br />Group 16 properties:<br /><ul><li>group contains three nonmetals, one metalloids, and one metal
  35. 35. 6 electrons in the outer level
  36. 36. reactive
  37. 37. solids at room temperature (except for oxygen, which is a gas)</li></li></ul><li>Group 17: Halogens<br /><ul><li>Halogens are the elements in Group 17. </li></ul>Group 17 properties:<br /><ul><li>group contains nonmetals
  38. 38. 7 electrons in the outer level
  39. 39. very reactive
  40. 40. poor conductors of electric current, never in uncombined form in nature</li></li></ul><li>Group 18: Noble Gases<br />Noble gasesare the elements in Group 18.<br /><ul><li>Group 18 properties:
  41. 41. group contains nonmetals
  42. 42. 8 electrons in the outer level (except helium, which has 2)
  43. 43. unreactive
  44. 44. colorless, odorless gases at room temperature</li></li></ul><li>Hydrogen<br />The properties of hydrogen do not match the properties of any single group, so hydrogen is set apart.<br /><ul><li>a nonmetal
  45. 45. 1 electron in the outer level
  46. 46. reactive
  47. 47. colorless, odorless gas at room temperature, low density</li>

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