Bell Work If You Did Not Get Your Lab Checked Off On Wed… Staple Together And Turn In  Bond Properties Lab  Solubility Lab

NEXT CLASS  Bring In A Few “Old Pennies” – prior to 1980

Learning Target Predict and explain how the properties of a substance relate to the type of bonding and the strength of electrical forces between particles Today’s Focus: Understanding Metallic Bonds & Bond Properties By:  Discussing the formation of metallic bonds and bond properties  Analyzing diagrams to complete captions  Comparing and contrasting bond types and bond properties

Goal Of Stability Valence electrons - determine how atom’s react Different Players = Different Way To Become Stable

Forming Metallic Bonds All Metals Need To Shed e- To Become Stable Both Players Need To Find A New Home For Their Valence e-! Transfer Of Electrons Won’t Work ! Sharing Of Electrons Won’t Work!

Forming Metallic Bonds 1st Outer energy level and valence e- are shed so that a stable octet remains

Forming Metallic Bonds 2 nd Metal Atoms Become Positively Charged Cations

Forming Metallic Bonds 3 rd Free e- Move Randomly As They Are Equally Attracted To Each Of The Cations

Forming Metallic Bonds 4 th The “sea of moving e-” Forms A Collective e- Cloud Metal Ions Get Held In Place By The Single e- Cloud EMF Btwn Shed e- And Multiple Cations Creates Metallic Bond

Metallic Bond Organized Arrangement Creates A Crystalline Structure Arrangement of cations determines metal properties Face Centered Body Centered “Flexibility” “Strength”

Chemical Names & Formulas GOOD NEWS! NO NAMES OR FORMULAS FOR METALLIC BONDINGS ! 1.Metallic bonds DO NOT FORM COMPOUNDS OR MOLECULES a. Bonded metal elements are still the same metal element i.e. Sheet of aluminum = Al i.e. Copper wire = Cu

Chemical Names & Formulas 2. Metallic bonds can form MIXTURES of metals called ALLOYS a.Alloys are made when metals dissolves into each other The atoms are next to each other but not bonded to each other

Structure = Function = Properties EMF = Bond How is the EMF for metallic bonds…  Similar to that of ionic bonds?  Similar to that of covalent bonds?  Different from other bond types? Bonding and structure explains the properties of a substance! IONICCOVALENTMETALLIC

Structure = Function = Properties Bonding and structure explains the properties of a substance! IONICCOVALENTMETALLIC Crystalline (Crystal Structure) Organized Particles Fixed In Place Charge Particles That Fit Tightly & Build On Each Other Particles That Can Make Multiple Connections The Winners Are?

Structure = Function = Properties Bonding and structure explains the properties of a substance! IONICCOVALENTMETALLIC Melting/Boiling Points Contain Bonds With Strong EMF Have An Organized Structure Have Multiple Connections Btwn Particles Require More Energy To Change Connections = Higher Temps Rank From Highest To Lowest Is? HIGH MED HIGH MED HIGH LOW

Structure = Function = Properties Bonding and structure explains the properties of a substance! IONICCOVALENTMETALLIC Solubility “like dissolves like” Must form similar intermolecular connections Charges w/ charges; Ionic & Polar Covalent Uncharged w/ uncharged; Nonpolar Covalent & Metallic Which Substances Are Insoluble In Water?

Structure = Function = Properties Bonding and structure explains the properties of a substance! IONICCOVALENTMETALLIC Flexibility Set bonding allows for no movement = Brittle Variable bonding allows for movement = Malleable Which Substances Are Brittle? Brittle

Structure = Function = Properties Bonding and structure explains the properties of a substance! IONICCOVALENTMETALLIC Conductivity Passing along a current through moveable charges Which Substances Are Conductive As Solids?

Structure = Function = Properties Bonding and structure explains the properties of a substance! IONICPOLAR COVALENTNONPOLAR COVALENT Conductivity Passing along a current through moveable charges Which Substances Are Conductive As Liquids & When Dissolved?

Things To Do  Complete The Quiz  Turn In The Quiz  Complete Understanding Check Ws  Have Answers Checked  INDIVIDUALLY Do The Bonding Venn Diagram

Homework Finish