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October 4*5*1/1/1*1, 2009

October 4*5*1/1/1*1, 2009. Objectives SWBAT show the formation of ionic bonds SWBAT make create balanced ionic compounds SWBAT Track tests Catalyst How many electrons will the following atoms need to gain or lose to be stable?? Na Cl Pb Xe Ca. Catalyst Review Tracking

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October 4*5*1/1/1*1, 2009

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  1. October 4*5*1/1/1*1, 2009 Objectives • SWBAT show the formation of ionic bonds • SWBAT make create balanced ionic compounds • SWBAT Track tests Catalyst • How many electrons will the following atoms need to gain or lose to be stable?? • Na • Cl • Pb • Xe • Ca

  2. Catalyst Review Tracking Formation of Ionic Compounds! Agenda

  3. Unit 3 CHAMPIONS!! (90% and above) Period 2 (79% Avg) Period 3 (80% Avg) Jasmine Castro Jonathan Cordero Christina DeArmas Taylor Delaune Kaynetra Hunter Angelle Johnson Harpreet Kaur Jontrel Mackey Kevin Martin Isaac Wallis Steven Webb • DiQuan Forcell • Ruben Garcia • Dalvin Hickerson • Iesha Nelson • Jahaira Sanchez • Brandon Toney

  4. Ionic Bonds!

  5. Formation of an ion • How many electrons do the following atoms gain or lose to become stable? • Na • Cl • We have a new method of writing this: • We call it showing the formation of an ion • What is different about how we write each one? Lose 1e- Gain 1e- Losing electrons Na  Na+ + 1e- Cl + 1e-  Cl- Gaining electrons

  6. Formation of ion practice • Show the formation of the following ions: • First figure out if it will gain or lose e- • Then show the formation of the ion • H • B • Mg • O • I

  7. Ionic BONDS • Forms between metal and non-metal • Forms between a cation and anion

  8. Ionic BONDS! • When an ionic bond forms, we need to balance out the oxidation numbers (charges) to equal ZERO. • In other words, the same number of electrons need to be gained or lost overall

  9. Ionic BONDS! • If we wanted to form an ionic bond between Sodium and Chlorine… 1. Show the formation of the stable ions • Na  Na+ + 1e- • Cl + 1e-  Cl- 2. Make sure the same number of electrons have been transferred, if not then multiply to make them the same • Write out your final expression showing the number of each atom Na+ + Cl-  NaCl

  10. Let’s try another one! • Show what ionic compound will form from Potassium and Sulfur. • Show the formation of the stable ions • Make sure the same number of electrons have been transferred, if not multiply to make them the same. • Write out your final expression

  11. The hardest example you’ll see… • Show what ionic compound will form from Aluminum and Oxygen

  12. Try these on your own • Show what ionic compounds will form: • Aluminum and Oxygen • Rubidium and Iodine • Magnesium and Oxygen • Strontium and Nitrogen

  13. 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…

  14. Ca2+As3- Kris Kross Method! Ca3As2

  15. Write down the stable ions and cross the oxidation numbers (charges) to make them subscripts Na1+Cl1- NaCl Pb4+O2- Pb2O4

  16. K F Ba N Ga O Ca Cl K Si Ionic Compounds

  17. K+F- Ba N Ga O Ca Cl K Si Ionic Compounds

  18. KF Ba N Ga O Ca Cl K Si Ionic Compounds

  19. KF Ba2+N3- Ga O Ca Cl K Si Ionic Compounds

  20. KF Ba3N2 Ga O Ca Cl K Si Ionic Compounds

  21. KF Ba3N2 Ga3+O2- Ca Cl K Si Ionic Compounds

  22. KF Ba3N2 Ga2O3 Ca Cl K Si Ionic Compounds

  23. KF Ba3N2 Ga2O3 Ca2+Cl- K Si Ionic Compounds

  24. KF Ba3N2 Ga2O3 CaCl2 K Si Ionic compounds

  25. KF Ba3N2 Ga2O3 CaCl2 K+Si4- Ionic compounds

  26. KF Ba3N2 Ga2O3 CaCl2 K4Si Balancing Chemical Reactions

  27. For Polyatomics it gets a bit more complex Pb4+SO43- Pb3(SO4)4 (NH4)1+PO43- (NH4)3 PO4

  28. Practice with writing formulas for ionic compounds

  29. Exit Ticket • What do the two charges in an ionic compound have to balance to? • Write the formulas for the following ions: A) K O B) Na Br C) Mg S

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