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Atoms & Chemical Bonding

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  1. Atoms&Chemical Bonding Created in 2008 by Tim F. Rowbotham, Modified in 2011

  2. Element Cards • Follow the directions in the following slides to complete this journal

  3. Element Cards (Part #1) A.) Arrange the cards into some sense of order according to their properties B.) Look for patterns both up & down & sideways C.) Answer questions 1-3 on the “Element Cards” Sheet

  4. Element Cards (Part 2) A.) Organize your cards according to the periodic table B.) Answer questions 4-7 on the “Element Cards” Sheet.

  5. Element Cards D.) Return your cards to the envelope E.) Return the envelope to the front table F.) Turn to page 1 of your Packet

  6. Atoms&Chemical Bonding Created in 2008 by Tim F. Rowbotham, Modified in 2011

  7. NOTES

  8. Valence Electrons • Electrons in the outermost energy level are known as valenceelectrons. • Valence electrons are important because they are the only ones involved in chemicalbonding.

  9. Valence Electrons • Valence electrons can be gained, lost, or shared by atoms during chemical bonding. • This desire for a certain amount of valence electrons is what causes chemical reactions.

  10. Valence Electrons • How many valence electrons in this atom? • REMEMBER VALENCE ELECTRONS ARE ONLY THOSE IN THE OUTER ENERGY LEVEL

  11. How many valence electrons in this atom? • 1 • 2 • 4 • 6

  12. How many valence electrons in this atom? • 9 • 7 • 3 • 2

  13. How many valence electrons in this atom? • 1 • 2 • 4 • 88

  14. How many valence electrons in this atom? • 1 • 2 • 4 • 88

  15. Return your remoteComplete p. 6-7 of your packet Created in 2008 by Tim F. Rowbotham, Modified in 2011

  16. Entrance QuestionsReady your remote Created in 2008 by Tim F. Rowbotham, Modified in 2011

  17. How many valence electrons in this atom? • 1 • 2 • 4 • 6

  18. How many valence electrons in this atom? • 1 • 2 • 4 • 12

  19. How many valence electrons in this atom? • 1 • 2 • 4 • 20

  20. How many valence electrons in this atom? • 1 • 2 • 4 • 38

  21. CHEMICAL BONDING NOTES Turn to page 1 of your CHEMICAL BONDING PACKET

  22. Rows on the Periodic Table • Rows across the periodic table are known as periods. • Elements in the same row have the same number of energylevels. • This outer energy level is often referred to as the valence energy level or the valenceshell.

  23. Families on the Periodic Table • Elements in the same column of the periodic table are known as groups or families. • Elements in the same family have the same number of valence electrons.

  24. Families & Properties • Since elements in the same family have the same number of valence electrons, they behave very similarly in a chemicalreaction. • Therefore, atoms in the same family have very similar properties!!!

  25. Using the Periodic Table • How to Determine the Number of Valence Electrons

  26. Learning Checks • Ready your Remotes

  27. Columns on the periodic table are called • Periods • Groups • Compounds • Bonding Reagents

  28. What is true of elements in the same column of the periodic table? • Same first letter • Similar properties • Same number of protons as neutrons • Discovered in the same year

  29. Rows on the periodic table are called • Groups • Compounds • Periods • Bonding reagents

  30. What is the valence energy level of strontium (A# = 38) ? • 2nd • 3rd • 4th • 5th

  31. What is the valence energy level of Mercury (A# = 80) ? • 3rd • 4th • 5th • 6th

  32. How many valence electrons does bromine have(A# = 35) ? • 8 • 7 • 6 • 4

  33. How many valence electrons does phosphorus have(A# = 15) ? • 8 • 7 • 6 • 5

  34. What is the valence energy level of calcium (A# = 20) ? • 1st • 2nd • 3rd • 4th

  35. How many valence electrons does calcium have(A# = 20) ? • 1 • 2 • 3 • 4

  36. Electron Dot Diagrams • Since only the valence electrons are involved in chemical bonding, chemists have a quicker, easier way to represent atoms when showing bonding called an electrondotdiagram.

  37. Electron Dot Diagrams • An electron dot diagram is simply the chemicalsymbol of an element with 1 dot for every valenceelectron it has. • This is also referred to as a Lewis dot structure.

  38. Sample Dot Diagrams

  39. Learning Checks • Ready your Remotes

  40. Rows on the periodic table are called • Groups • Compounds • Periods • Bonding reagents

  41. What is true of elements in the same column of the periodic table? • Same first letter • Similar properties • Same number of protons as neutrons • Discovered in the same year

  42. Using the Periodic Table • Return Your Remote • Pick up & Complete Electron Dot diagrams WS • Complete PACKET p.8 “Properties of a Missing Element”

  43. Using the Periodic Table • Valence Electrons, Lewis Dot Diagrams & Bohr Models

  44. Entrance Questions • Ready your Remotes • Get out a periodic table

  45. Columns on the periodic table are called • Periods • Groups • Compounds • Bonding Reagents

  46. How many valence electrons does aluminum have(A# = 13) ? • 2 • 3 • 4 • 5

  47. What is the valence shell of aluminum (A# = 13) ? • 1st • 2nd • 3rd • 4th

  48. How many valence electrons does phosphorus have(A# = 15) ? • 1 • 3 • 5 • 7

  49. Columns on the periodic table are called • Periods • Families • Compounds • Bonding Reagents

  50. What is true of elements in the same column of the periodic table? • Same first letter • Similar properties • Same number of protons as neutrons • Discovered in the same year