1. Ionic Bonds  Result from electrostatic attractions of closely packed, oppositely charged ions.  Form when an atom, which can easily lose electrons reacts with one which has a high electronegativity, that is, it can easily gain electrons. The vertical A column number (# of valence electrons) in the Periodic Table indicates the ion that forms and the number of electrons gained or lost.  Eg. Na (-1e - ) and Cl (7e - ; +1 e - ); Mg (-2e - ) and Br (7e - ; +1 e - ) ; K (-1e - ) and O (6e - ; +2 e - ) http://www.pbslearningmedia.org/asset/lsps07_int_ionicbonding/

2. Electron Configurations

3. Ionic Compounds  Neutrally Charged  Eg. Salt: NaCl  1 Na + and 1 Cl -  What is the proportion of ions for a compound formed from Mg ion and chlorine?  Mg 2+ and Cl   1 Mg 2+ combines with 2 Cl  MgCl 2 Magnesium chloride chlorine

4. Predict the formula for the binary ionic compound formed by aluminum and oxygen. A) Al 2 O 3 B) Al 3 O 2 C) Al 2 OD) AlO 2 QUESTION

5. Provide Formulas for the Compounds formed from the Ions of the Atoms

6. NaClMgCl 2 InCl 3 Mg 3 N 2 MgOIn 2 O 3 Na 3 N Na 2 O InN

7. Names from Formulas Name the following  CaBr 2  K 2 S  CsCl  Al 2 O 3 Calcium bromide Potassium sulfide Cesium chloride Aluminum oxide

8. Formulas from Names Provide Formulas: Barium iodide Sodium sulfide Lithium fluoride Calcium nitride BaI 2 Na 2 S Ca 3 N LiF

9. Polyatomic Ions Discrete units of covalently bonded atoms that behave as ions http://chemconnections.org/general/chem120/polyatomics.html

10. Which formula containing polyatomic ions is correct? A) MgNO 3 B) NH 4 CO 3 C) Na(PO 4 ) 3 D) Al 2 (SO 4 ) 3 QUESTION (NO 3 ) -1 (NH 4 ) +1 (CO 3 ) -2 (PO 4 ) -3 (SO 4 ) -2

11. Which formula containing polyatomic ions is correct? A) MgNO 3 B) NH 4 CO 3 C) Na(PO 4 ) 3 D) Al 2 (SO 4 ) 3 ANSWER Aluminum sulfate

12. Ionic vs. Molecular (Covalent) Compounds Salt (ionic) vs. Water (covalent) http://chemconnections.org/general/movies/html-swf/comp_molec_ionic_co.htm

13. Covalent Chemical Bonds Molecular Compounds https://www.youtube.com/watch?v=bD-SH1ASbjw View: Hank Green Crash Course http://www.pbslearningmedia.org/asset/lsps07_int_covalentbond/

14. Prefixes & The Number of Atoms Non-metal / Non-ionic Names

15. Predict the correct name of the compound represented in the box. A) Nitrogen oxideB) Oxygen nitride C) Dinitrogen monoxide D) Nitrogen dioxide QUESTION

16. Chemical Formulas & Molecular Representations

17. How many hydrogens, oxygens, and carbons are there in: ethanol? ethylene glycol? aspirin? Red spheres are oxygen, the white/gray are hydrogen, and black carbon. C9H8O4C9H8O4 C2H6OC2H6O C2H6O2C2H6O2

18. Structural Representations of Quinine C 20 H 24 N 2 O 2