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Lecture 6.2- Electron Configurations & the Periodic Table
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Lecture 6.2- Electron Configurations & the Periodic Table

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  • This diagram classifies elements into blocks according to sublevels that are filled or filling with electrons. Interpreting Diagrams In the highest occupied energy level of a halogen atom, how many electrons are in the p sublevel?

Transcript

  • 1. Lecture 6.2- e- configs & the Periodic Table
  • 2. Electron configurations can be shortened by writing the symbol of the previous noble gas in brackets to represent the inside electrons. Shortened 1s2 [He]2s22p6 [Ne]3s23p6 [Ar]4s24p6
  • 3. Electron Configurations in Groups Elements can be sorted into noble gases, representative elements, transition metals, or inner transition metals based on their electron configurations.
  • 4. Electron Configurations in Groups Noble gases (Group 8A) have full outer energy levels. Usually an s2p6 configuration. Helium is full with s2
  • 5. Electron Configurations in Groups
  • 6. Electron Configurations in Groups The Representative Elements
  • 7. Electron Configurations in Groups The Representative Elements For representative elements s and p sublevels of the highest occupied energy level are not filled.
  • 8. Electron Configurations in Groups The Representative Elements For representative elements s and p sublevels of the highest occupied energy level are not filled. The group number equals the number of electrons in the highest/outermost energy level.
  • 9. Electron Configurations in Groups Alkali metals (Group 1A) have one electron in the highest occupied energy level. s1 configuration
  • 10. Electron Configurations in Groups Alkaline earth metals (Group 2A) have two electrons in the highest occupied energy level. s2 Halogens(Group 7A) have an s2p5 configuration.
  • 11. Transition Elements Transition Elements There are two types of transition elements—transition metals and inner transition metals. They are classified based on their electron configurations.
  • 12. Transition Elements
  • 13. Transition Elements In transition metals, the highest energy electrons are found in inner d orbitals.
  • 14. Transition Elements In transition metals, the highest energy electrons are found in inner d orbitals. In atoms of an inner transition metal, the highest occupied s sublevel and an inner f sublevel contain electrons.
  • 15. Periods The period number tells which energy level the outside electrons are in. Ex. 3rd period sodium(Na) is [Ne]3s1 4th period potassium(K) is [Ar]4s1
  • 16. Blocks of Elements Using the periodic table, write the electron configuration of N, Ca, Ti, Se, Cl, and He.
  • 17. Filling orbitals Positive nucleus 1 2 3 4 The red circles represent energy levels
  • 18. Filling orbitals H 1e- Positive nucleus 1s1 1 2 3 4 The red circles represent energy levels
  • 19. Filling orbitals He 2e- Positive nucleus 1s2 1 The first 2 energy 3 level is full 4 The red circles represent energy levels
  • 20. Filling orbitals Helium is All the electrons a noble gas Positive that helium nucleus has 1s2 = [He] 1 2 3 4 The red circles represent energy levels
  • 21. Filling orbitals Li 3e- All the electrons Positive that helium nucleus 1s2 2s1 has or [He] 2s1 1 2 3 4 The red circles represent energy levels
  • 22. Filling orbitals Be 4e- All the electrons Positive that helium nucleus 1s2 2s2 has or [He] 2s2 1 2 3 4
  • 23. Filling orbitals All the electrons Positive that helium nucleus has 1 2 B 5e- 3 4 [He] 2s2 2p1
  • 24. Filling orbitals All the electrons Positive that helium nucleus has 1 2 C 6e- 3 4 [He]2s2 2p2
  • 25. Filling orbitals All the electrons Positive that helium nucleus has 1 2 N 7e- 3 4 [He]2s2 2p3
  • 26. Filling orbitals All the electrons Positive that helium nucleus has 1 2 O 8e- 3 4 [He]2s2 2p4
  • 27. Filling orbitals All the electrons Positive that helium nucleus has 1 2 F 9e- 3 4 [He]2s2 2p5
  • 28. Filling orbitals All the electrons Positive that helium nucleus has 1 2 Ne 10e- 3 4 [He]2s2 2p6 2nd energy level is full!
  • 29. Filling orbitals Neon is Neon’s ten a noble gas Positive electrons nucleus 1 2 Ne 10e- 3 4 [He]2s2 2p6 = [Ne]
  • 30. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 Na 11e- 3 4 [Ne]3s1
  • 31. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 Mg 12e- 3 4 [Ne]3s2
  • 32. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 Al 13e- 3 4 [Ne]3s2 3p1
  • 33. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 Si 14e- 3 4 [Ne]3s2 3p2
  • 34. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 P 15e- 3 4 [Ne]3s2 3p3
  • 35. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 S 16e- 3 4 [Ne]3s2 3p4
  • 36. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 Cl 17e- 3 4 [Ne]3s2 3p5
  • 37. Filling orbitals Neon’s ten Positive nucleus electrons 1 2 Ar 18e- 3 4 [Ne]3s2 3p6
  • 38. Filling orbitals Argon is Argon’s a noble gas Positive 18 nucleus electrons 1 2 Ar 18e- 3 4 [Ne]3s2 3p6 = [Ar]
  • 39. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 K 19e- 3 4 [Ar]4s1
  • 40. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Ca 20e- 3 4 [Ar]4s2
  • 41. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Sc 21e- 3 4 [Ar] 3d1 4s2
  • 42. Filling orbitals Transition metals have their Argon’s highest Positive 18 nucleus energy electrons electrons 1 in inner d 2 orbitals Sc 21e- 3 4 [Ar] 3d1 4s2
  • 43. Filling orbitals Transition metals have their Argon’s highest Positive 18 nucleus energy electrons electrons 1 in inner d 2 orbitals Ti 22e- 3 4 [Ar] 3d2 4s2
  • 44. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 V 23e- 3 4 [Ar] 3d3 4s2
  • 45. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Cr 24e- 3 4 [Ar] 3d4 4s2
  • 46. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Mn 25e- 3 4 [Ar] 3d5 4s2
  • 47. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Fe 26e- 3 4 [Ar] 3d6 4s2
  • 48. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Co 27e- 3 4 [Ar] 3d7 4s2
  • 49. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Ni 28e- 3 4 [Ar] 3d8 4s2
  • 50. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Cu 29e- 3 4 [Ar] 3d9 4s2
  • 51. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Zn 30e- 3 4 [Ar] 3d10 4s2 The 3rd energy level is full!
  • 52. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Ga 31e- 3 4 [Ar] 3d10 4s2 4p1
  • 53. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Ge 32e- 3 4 [Ar] 3d10 4s2 4p2
  • 54. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 As 33e- 3 4 [Ar] 3d10 4s2 4p3
  • 55. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Se 34e- 3 4 [Ar] 3d10 4s2 4p4
  • 56. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Br 35e- 3 4 [Ar] 3d10 4s2 4p5
  • 57. Filling orbitals Argon’s Positive 18 nucleus electrons 1 2 Kr 36e- 3 4 [Ar] 3d10 4s2 4p6
  • 58. Filling orbitals Krypton is a noble gas krypton’s Positive 36 nucleus electrons 1 2 3 Kr 36e- 4 5 [Ar]3d104s24p6 = [Kr]
  • 59. Filling orbitals Krypton is a noble gas krypton’s Positive 36 nucleus electrons 1 2 3 Rb 37e- 4 5 [Kr] 5s1
  • 60. And so on and so forth……