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Catalyst – September 5(6), 2010 HOMEWORK OUT PLEASE!

Catalyst – September 5(6), 2010 HOMEWORK OUT PLEASE!. Based on the octet rule , how many electrons will the following atoms need to gain or lose to be stable ?? Write “gain” or “lose” and number of electrons. Na Cl Pb Xe Ca. Today’s Agenda. Catalyst Homework Review

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Catalyst – September 5(6), 2010 HOMEWORK OUT PLEASE!

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  1. Catalyst – September 5(6), 2010HOMEWORK OUT PLEASE! Based on the octet rule, how many electrons will the following atoms need to gain or lose to be stable?? Write “gain” or “lose” and number of electrons. Na Cl Pb Xe Ca

  2. Today’s Agenda Catalyst Homework Review Writing Ionic Formulas! Naming Ionic Compounds! Practice! Exit Question Homework: Bond/Formula Worksheet! Study for Quiz 3.1!

  3. Today’s Objectives • SWBAT show the formation of ionic bonds. • SWBAT write formulas for balanced ionic compounds. • SWBAT name ionic compounds.

  4. Yesterday’s Exit Question • List 3 characteristics of ionic compounds. • Which has a higher FIRST ionization energy: sodium (Na) or francium (Fr)?

  5. Higher 3rd IE – B or Ca?

  6. Higher 1st IE – F or Mg? F Mg

  7. Test Prep Review • Which general trend is demonstrated by the Group 17 elements as they are considered in order from top to bottom on the Periodic Table? • (1) a decrease in atomic radius • (2) a decrease in electronegativity • (3) an increase in first ionization energy • (4) an increase in nonmetallic behavior

  8. Test Prep Review • An atom of aluminum in the ground state and an atom of gallium in the ground state have the same • (1) mass • (2) electronegativity • (3) total number of protons • (4) total number of valence electrons

  9. Let’s think about this… • What does lithium do to become stable? • What does chlorine do to become stable? • How do they come together???

  10. Let’s think about this… • What does beryllium do to become stable? • What does oxygen do to become stable? • How do they come together???

  11. Let’s think about this… • What does beryllium do to become stable? • What does chlorine do to become stable? • How do they come together???

  12. Alright… That process takes a long time…scientists aren’t going to do it every single time WE HAVE A SHORCUT TO FIND WHAT IONIC COMPOUND WILL FORM! Get ready for it…

  13. Kris Kross Method! Ca2+As3- Ca3As2

  14. Key Point #1: To write ionic formulas, write down the stable ions and cross the oxidation numbers (charges) to make them subscripts Na1+Cl1- NaCl Li1+O2- Li2O

  15. Use the charges: The two ionic charges must balance to ZERO!!!

  16. Or use the ionic cheat sheet to find the charges. Remember! The two ionic charges must balance to ZERO!!!

  17. Ca2+As3- Kris Kross Method! Ca3As2

  18. Which charge ALWAYS comes first? POSITIVE!!!

  19. Which type of element ALWAYS comes first? METAL!!!

  20. K F Ba N Ga O Ca Cl K Si Co I

  21. K1+F1- Ba N Ga O Ca Cl K Si Co I

  22. KF Ba N Ga O Ca Cl K Si Co I

  23. KF Ba2+N3- Ga O Ca Cl K Si Co I

  24. KF Ba3N2 Ga O Ca Cl K Si Co I

  25. KF Ba3N2 Ga3+O2- Ca Cl K Si Co I

  26. KF Ba3N2 Ga2O3 Ca Cl K Si Co I

  27. KF Ba3N2 Ga2O3 Ca2+Cl1- K Si Co I

  28. KF Ba3N2 Ga2O3 CaCl2 K Si Co I

  29. KF Ba3N2 Ga2O3 CaCl2 K1+Si4- Co I

  30. KF Ba3N2 Ga2O3 CaCl2 K4Si Co I

  31. K F Ba N Ga O Ca Cl K Si Co I You don’t know about transition metals! So.. the problem must tell you the number of electrons. Cobalt (II) means that Cobalt gives up 2 electrons

  32. K F Ba N Ga O Ca Cl K Si Co2+I1-

  33. K F Ba N Ga O Ca Cl K Si CoI2

  34. Polyatomics 3- 3- 1 Phosphate Ion PO4 2 Phosphate Ions (PO4)2

  35. Calcium Phosphate Ca2+ PO43- 6- 3- Ca2+ 6+ Ca2+ 3- Ca2+

  36. For POLYATOMICS it gets a bit more complex Pb4+SO42- Pb2(SO4)4 NH41+PO43- (NH4)3 PO4

  37. You have a little memorizing to do… • You have to memorize the formula and charges for these polyatomic ions for the test… • And life

  38. Naming Ionic Compounds

  39. Key Point #2: To name ionic compounds, • Write full name of first element (metal). • Second element ends in -ide. • Ignore subscripts! Naming Ionic Compounds

  40. Draw a mental line between the ions. Na+ Cl- Naming Ionic Compounds

  41. Binary Ionic Compound – an ionic compound composed of two elements Naming Ionic Compounds

  42. CaCl2 Naming Ionic Compounds

  43. CaCl2 Calcium Chloride Naming Ionic Compounds

  44. Al2O3 Naming Ionic Compounds

  45. Al2O3 Aluminum Oxide Naming Ionic Compounds

  46. ZnO Naming Ionic Compounds

  47. ZnO Zinc (II) Oxide Naming Ionic Compounds

  48. BaCO3 Barium Naming Ionic Compounds

  49. If the first element is +2, where should we find the second? (Remember, charges must balance!) Naming Ionic Compounds

  50. BaCO3 Barium Naming Ionic Compounds

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