Lecture 6.1- The Periodic Table

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Lecture 6.1 for Honors and Prep Chemistry

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Lecture 6.1- The Periodic Table

  1. 1. Lecture 6.1- The Periodic Table
  2. 2. Chemists use the propertiesof elements to sort them intogroups.
  3. 3. Chlorine, bromine, and iodine have very similar chemical properties.
  4. 4. Mendeleev arranged the elements inhis periodic table in order ofincreasing atomic mass.
  5. 5. Mendeleev arranged the elements inhis periodic table in order ofincreasing atomic mass.Mendeleev’speriodic table wasused to predictthe properties ofundiscoveredelements.
  6. 6. An Early Version of Mendeleev’s Periodic Table
  7. 7. In the modern periodic table,elements are arranged in orderof increasing atomic number.
  8. 8. The periodic law: When elements arearranged in order of increasing atomicnumber, there is a periodic repetition oftheir physical and chemical properties.
  9. 9. The periodic law: When elements arearranged in order of increasing atomicnumber, there is a periodic repetition oftheir physical and chemical properties. –The properties of the elements within a period change as you move across a period from left to right.
  10. 10. The periodic law: When elements arearranged in order of increasing atomicnumber, there is a periodic repetition oftheir physical and chemical properties. –The properties of the elements within a period change as you move across a period from left to right. –The pattern of properties within a period repeats as you move from one period to the next.
  11. 11. The stair-step line divides themetals from the nonmetals.
  12. 12. Metals are to the left of the stair-step line
  13. 13. Nonmetals are to the right.
  14. 14. Any square with a side on the stair-step line is a metalloid (semi-metal),EXCEPT ALUMINUM.
  15. 15. Any square with a side on the stair-step line is a metalloid (semi-metal),EXCEPT ALUMINUM.Across a period, the properties of elementsbecome less metallic and more nonmetallic.
  16. 16. Metalloids (semi-metals)
  17. 17. Metals are good conductors ofheat and electric current.
  18. 18. Metals are good conductors ofheat and electric current.–80% of elements are metals.
  19. 19. Metals are good conductors ofheat and electric current.–80% of elements are metals.–Metals have a high luster, are ductile, and are malleable.
  20. 20. Metals are good conductors ofheat and electric current.–80% of elements are metals.–Metals have a high luster, are ductile, and are malleable.–Metals tend to lose electrons.
  21. 21. Metals are good conductors ofheat and electric current.–80% of elements are metals.–Metals have a high luster, are ductile, and are malleable.–Metals tend to lose electrons.–All metals are solids, except Hg.
  22. 22. 6.1Uses of Iron, Copper, and Aluminum
  23. 23. 6.1Uses of Iron, Copper, and Aluminum
  24. 24. 6.1Uses of Iron, Copper, and Aluminum
  25. 25. In general, nonmetals are poorconductors of heat and electriccurrent.
  26. 26. In general, nonmetals are poorconductors of heat and electriccurrent. –Non-metals tend to gain e-
  27. 27. In general, nonmetals are poorconductors of heat and electriccurrent. –Non-metals tend to gain e- –Most non-metals are gases, but some are solids or liquids.
  28. 28. In general, nonmetals are poorconductors of heat and electriccurrent. –Non-metals tend to gain e- –Most non-metals are gases, but some are solids or liquids. –A few nonmetals are solids, like sulfur, carbon, and phosphorus. –Bromine is a dark-red liquid.
  29. 29. A metalloid has some metallic andnon-metallic properties. •Also called semi-metals The behavior of a metalloid can be controlled by changing conditions.
  30. 30. If a small amount of boron is mixed withsilicon, the mixture is a good conductor ofelectric current. Silicon can be cut intowafers, and used to make computer chips.
  31. 31. The periodic table displays the symbolsand names of the elements, along withinformation about the structure of theiratoms.
  32. 32. Groups are labeled 1-18 or 1A-8A
  33. 33. The Group 1 (1A) elements are called alkali metals.1A
  34. 34. In their elemental form alkali metalsare extremely reactive, so they are notnaturally found in elemental form.search youtube for brainiac alkali metal to watch this video at home
  35. 35. In their elemental form alkali metalsare extremely reactive, so they are notnaturally found in elemental form.search youtube for brainiac alkali metal to watch this video at home
  36. 36. The Group 2 (2A) elements are called alkaline earth metals.2A
  37. 37. The nonmetals of Group 17 (7A) are called halogens. 7A
  38. 38. The noble gases are the elements inGroup 18 (8A) of the periodic table. 8A
  39. 39. The blimp containshelium, one of thenoble gases.
  40. 40. The Representative Elements Elements in groups 1A through 7A are often referred to as representative elements because they display a wide range of physical and chemical properties.
  41. 41. 6.2 Representative Elements
  42. 42. 6.2 Representative Elements
  43. 43. 6.2 Representative Elements
  44. 44. 6.2 Representative Elements
  45. 45. Transition metals
  46. 46. Transition metalsInnertransitionmetals

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