Chemical Bonding: Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and name of ionic compounds.

Chemical Bonding  Answer the following questions after you finish annotating the article: 1.Identify and define the two major types of bonding. 2.Classify each type of bond: a.C-----O b.Al-----S

Chemical Bonding: Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and name of ionic compounds.

Explain how you know what type of bond is being illustrated below.

Ionic Bonding Ionic Bonding  Transfer of valence electrons from a metal atom to a non-metal atom.  Creates a metal ion (cation) and non-metal ion (anion) that are held together by attractive forces (chemical bond)  Chemical bonds are intramolecular forces.  Formation of Ionic Compounds

Intramolecular Forces  The ionic bond  The attractive force between the metal and non-metal ions in the compound. Na Cl - Na Cl -

Ionic Compounds   The overall charge on any ionic compound is always zero.   The ratio of metal to non-metal ions has to equal zero.

Chemical Bonding: Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and name of ionic compounds.

Ionic Bonding (Lewis Dot Transfer) Ionic Bonding (Lewis Dot Transfer) Metal (Lewis Dot) Non-metal (Lewis Dot) Ionic Bonding (Lewis Dot Transfer) Chemical Formula

Naming Ionic Compounds Naming Ionic Compounds

Chemical Bonding: Infinite Campus:  Ionic Bonding Lab (12pts.)  Periodict Trend Lab (14pts.) Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and chemical name of compounds.

Ionic Bonding Lab Ionic Bonding Lab Purpose:  Identify which elements would bond with one another to form an ionic bond.  Illustrate ionic bonding using Lewis Dot transfer.  Establish chemical formula

Chemical Bonding Objectives:  Understand why compounds exist in nature.  Illustrate chemical bonding between elements using Lewis Dot structures.  Indentify and compare the two classes of compounds by their chemical and physical properties.  Identify and predict compound names and formulas by element’s location on the periodic table.

Chemical Bonding: Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and chemical name of compounds.  Indentify and compare the two classes of compounds by their chemical and physical properties.

Ionic vs. Covalent Cmpds. Properties Properties Grp 1Grp 2 Grp 3Grp 4 Grp 5 Solubility: Which samples are soluble? Crystal Growth: Grew slowest: 1 Grew fastest: 4 Electrical Conduction: Which conducted electricity? Melting point time: Slowest? Fastest? 2nd

Ionic vs. Covalent Cmpds. Properties Properties Grp 1Grp 2 Grp 3Grp 4 Grp 5 Solubility: Which samples are soluble? Crystal Growth: Grew Fastest? Grew Slowest? Electrical Conduction: Which conducted electricity? Melting point time: Slowest? Fastest? 2nd

Chemical Bonding: Objectives:  Classify compounds by their chemical and physical properties. ( Analyze Properties Lab)

Properties of Chemical Compounds Properties of Chemical Compounds  Which kind of compounds conduct electricity when dissolved in water?

Properties of Ionic Compounds Properties of Ionic Compounds Ionic compounds can conduct an electric current when melted or dissolved in water. 7.2

Ionic Compounds: Crystal Lattice Ionic Compounds: Crystal Lattice  Stronger attractive force between ions  Faster crystal growth.

Covalent Compounds: Crystal Lattice   Weaker attractive forces between covalent compounds (molecules).   Slower crystal growth. production/th_med_crystals.jpg content/uploads/2008/12/sugar-molecule- 02.jpg o o o o CC C C

Melting Points of Compounds Melting Points of Compounds  Which has a higher melting point?  Does the table below prove or disprove your conclusion from the lab? Explain your answer. Chemical CompoundsMelting Point ( o C)Boiling Point ( o C) Cr 2 O 3 2,2664,000 SrF 2 1,4702,489 CCl CH 4 O Chemical Compounds Article

Properties of Chemical Compounds Collection of Ionic Compounds Collection of Covalent Compounds Why do ionic compounds in general have higher melting and boiling points? stronger attractive forces between ions

Properties of Chemical Compounds Properties of Chemical Compounds  Ionic Compounds are primarily solids at room temperature.  Molecules can be a solid, liquid, or gas at room temp. Examples:. O 2 and CH 4 (C 8 H 18 ) (C 8 H 8 )

Chemical Bonding: Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and chemical name of compounds.  Indentify and compare the two classes of compounds by their chemical and physical properties.

Chemical Bonding: Bell Ringer Chemical Bonding: Bell Ringer 1.Classify as ionic (I) or covalent (C ). a.CH 4 b. CuO c. PBr 3 d. K 3 N 2.Which of the above compounds would… a.conduct electricity? b.have a lower melting point? c.crystallize faster out of solution? d.Considered brittle 3. Why do many elements participate in chemical bonding?

Covalent Compounds Covalent Compounds

Electronegativity Values Electronegativity Values webassign.net

Molecules: Lewis Dot Sharing Molecules: Lewis Dot Sharing Molecular FormulaLewis Dot Sharing

Molecules: Lewis Dot Sharing Molecules: Lewis Dot Sharing Molecular FormulaLewis Dot Sharing

Chemical Bonding and Electronegativity Chemical Bonding and Electronegativity Chemical FormulaType of Bonds Single Double Triple Bonds: Ionic, Polar, Non-polar (EN difference) Cl 2 CH 4 SiO 2 PF 3 H2OH2O SO NP

Covalent Bonds Covalent Bonds Prentice Hall KY Teacher Express, 2008 Do non-metals share electrons equally during chemical bonding?

Electronegativity

Electronegativity Values Electronegativity Values webassign.net

Chemical Bonding: Polarity Bell Ringer Chemical Bonding: Polarity Bell Ringer 1.What does the penguin and the polar bear represent in the comic strip? 2.What does the ice cream scoops represent in the comic strip? 3. a. What did the iceberg represent? b. What is the trend in electronegativity according to the iceberg illustration? b. What is the trend in electronegativity according to the iceberg illustration? 4.Explain using the illustrations the difference between polar and non-polar covalent bonds?

Chemical Bonding : Electronegativity Difference Chemical Bonding : Electronegativity Difference

Covalent Bonds Covalent Bonds Prentice Hall KY Teacher Express, 2008 Polar Bonds: Where atoms do NOT share bonded electrons equally. Usually 2 different elements making up the bond. Ex. N----F bond Non-Polar Bonds: Where atoms share bonded electrons equally or very close to it. Usually same elements. Ex. O-----O

Chemical Bonding and Electronegativity Chemical Bonding and Electronegativity Chemical FormulaClassify Compound Chemical NameBonds: Ionic, Polar, Non-polar (EN difference) CO 2 C---O CI 4 C----I MgF 2 Mg---F N2N2 N----N Na 2 ONa---O

Chemical Bonding and Electronegativity Chemical Bonding and Electronegativity Chemical FormulaClassify Compound Chemical NameBonds: Ionic, Polar, Non-polar (EN difference) CO 2 C---O CI 4 C----I MgF 2 Mg---F N2N2 N----N Na 2 ONa---O

Chemical Bonding: Objectives:  Illustrate chemical bonding using Lewis Dot structures.  Establish chemical formula and chemical name of compounds.  Indentify and compare the two classes of compounds by their chemical and physical properties.  Classify and derive the name or formula of acids and bases. Homework: Exam Tuesday-Study this weekend!

Chemical Compounds Chemical Compounds Covalent Compounds Similarities Ionic Compounds

Chemical Bonding Chemical Bonding Ionic Bonding:  Many times between a metal and a non-metal ion.  Transfer of valence electrons.  Electronegativity difference between bonded ions is large.  Ionic Bond = Intramolecular Forces Covalent Bonding:  Between two non-metals atoms.  Share valence electron(s)  Electronegativity difference between bonded atoms is small.  Covalent Bond = Intramolecular Forces  Covalent compounds are also called molecules.

Acids and Bases Acids and Bases (HCl) (NaOH) dissociation

Acids and Bases Acids and Bases (HCl) (NaOH) dissociation

Acids and Bases Acids and Bases academic.cuesta.edu

Acids Acids Chemical Name:  Depends upon the anion’s suffix(ending). Chemical Formula:  Acids are electrically neutral.

Bases Bases Naming and establishing chemical formula:  Follow same rules as ionic compounds  Follow same rules as ionic compounds Ex. Na(OH): Ex. Iron (II) Hydroxide