1. Today’s Agenda.th 10/7/10 Warm up (Have your notebooks ready) Noble Gasses How to finish your packet

2. New Website You can get notes and homework from: http://teachers.yourhomework.com/blowe/

3. Warm up Write the electron configuration for: He Ne Ar What do they all have in common? Electrons, position on Periodic Table, etc.? 1s 2 1s 2s 2p 2 2 1s 2s 2p 3s 3p 22662

4. Answers All these elements are have full electron shells All these elements have no valence electrons All these elements are located on the right side of the periodic table. B/c of the lack of valence electrons, these elements do not react much.

5. Nobel Gasses The Nobel Gasses are located on the right side of the periodic table. They are also called the “Inert Gasses” These elements have a full electron shell Because of the full shell, these gasses tend not to react with other elements

6. Now how to finish your packet ElementNumber of valence electrons Electrons lost or gained to become stable Charge and symbol of the ion Same structure as which noble gas? Hydrogen1Loss 1H+H+ none

7. ElementNumber of valence electrons Electrons lost or gained to become stable Charge and symbol of the ion Same structure as which noble gas? Helium2noneHe

8. ElementNumber of valence electrons Electrons lost or gained to become stable Charge and symbol of the ion Same structure as which noble gas? Lithium1Loss 1Li + He

9. ElementNumber of valence electrons Electrons lost or gained to become stable Charge and symbol of the ion Same structure as which noble gas? Carbon4 But wait! Does Carbon want to loss 4 electrons or gain 4 electrons When you have this question, the answer is the atom ALWAYS wants to loss the 4 electrons Loss 4 C 4+ It lost 4 electrons so it has a positive 4 charge He The Equations is: C – 4e - –> C 4+

10. ElementNumber of valence electrons Electrons lost or gained to become stable Charge and symbol of the ion Same structure as which noble gas? Nitrogen5 It wants to gain 3 electrons to fill its outer shell Gain 3 N 3- It gained 3 electrons so it now has a 3- charge Ne The Equations is: N + 3e - –> N 3-

11. Last Table in your packet Complete the table for the Following Ions! You have to assume that the Atom has changed to a stable Ion Atomic Number ElementSymbolAtomic Mass ProtonsElectronsNeutrons 19Potas sium 39.101920 K+K+ Remember, its an ION! So it gave up one electron so it’s not 19 but… 18

12. Example of an Ionic Equation

13. Homework Finish up packet and study for quiz tomorrow 10/8/10: Electron configuration Ions and Iconic Equations Bohr model vs. modern (electron configuration) Filling in the tables (from the packet) Periodic table connections and facts You also have a test Monday! 10/11/10