Ionic Bonds  Result from electrostatic attractions of closely packed, oppositely charged ions.  Form when an atom, which can easily lose electrons reacts.

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Presentation transcript:

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 - )

Electron Configurations

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

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

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

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

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

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

Polyatomic Ions Discrete units of covalently bonded atoms that behave as ions

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

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

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