Bellwork 11-20-2014: Honors Write the chemical formula for Potassium Permanganate. Write the chemical formula for Sodium Chromate. Name the compound Ca(OH)2 Have out your homework (polyatomic and monoatomic ion worksheets) to be stamped!

Announcements: Honors Deadlines: Summative writing assignment: today after school Turn in lab for late grade: today after school Tutoring moved to TODAY

Vocab Cards! **Element Octet **Compound Outer shell **Diatomic Element Polar covalent bond Lewis dot structure Non-polar covalent bond Valence electrons Ionic bond Dissociation Electrical conductivity Solubility Cation Electronegativity Anion

Vocab Smash Game Rules You cannot start FAST WALKING until I have read the question completely NO RUNNING OR PUSHING! Teammates: DO NOT YELL OUT THE ANSWER! Each correct hit = 1 point If there is a tie: the face off will be correctly writing the chemical formula for an ionic compound

Cool Videos https://www.youtube.com/watch?v=ASLUY2U1M- 8&list=PLA97087254E575992&index=4

Bellwork 11-25-2014 Have out homework on writing and naming ionic compounds to be checked! Have out lab notebook: I will check ionic vs. covalent bonding lab and ionic bonding puzzle lab (EVERYONE!) Write the chemical formula for Lead (III) oxide using the crisscross method Name the compound: MgO using the rules from your note-taker

Announcements Go over homework If you did not show me your labs today, I need to see them by tomorrow!

Writing and Naming Ionic Compounds HW Writing: Naming: CaBr2 6. Ca3N2 1. Sodium Sulfide BaO 7. MgCl2 2. Potassium Chloride K2S 8. Be3P2 3. Calcium Sulfide LiF 9. Fe2O3 4. Lithium Oxide Na3N 10. CuBr2 5. Beryllium Nitride

Where are we? Intramolecular forces Intermolecular forces Between elements Lewis structures of single elements and molecule bonds Between molecules Lewis structures of molecules (interactions) Ionic Covalent Dipole-dipole Hydrogen Anion Cation Polar Non-polar London dispersion Ion-dipole Molecular shapes Polarity

Intermolecular Forces: Exploration Read the first part of your note-taker and INDEPENDENTLY write down in the think column (2 min) Share with your neighbor and write down any additional observations they made that you did not (2 min) Share with the class and write down any additional observations that others in the class cam up with (3 min)

Quiz Explain how ionic bonds are formed using cations, anions, charge (+/-) and give an example.

Intermolecular Forces: Exploration We will come back to this substance and figure out what it is later!!

Intermolecular Forces So far we have been looking at bonds and the forces that hold elements together in a compound What were these forces? Now we will look at INTER molecular forces: the forces that hold 2 or more different compounds or molecules together.

Type 1: Dipole-Dipole Dipole Moment: the charge distribution in a polar bond caused by differences in electronegativities between atoms in the bond Shown using a vector: Head of the arrow is the δ- end, butt of the arrow is the δ+ end

Video – dipole-dipole https://www.youtube.com/watch?v=cERb 1d6J4-M

Dipole-Dipole Interaction The attraction of one molecules dipole for the opposite dipole on another molecule H Cl H Cl

Type 2: Hydrogen Interaction More specific dipole-dipole interaction H-interaction: The interaction of hydrogen’s dipole with opposite dipole on a O, N or F atom ONLY

Water Demos Why does the soap make the cinnamon scatter? Soap Molecule

Type 3: London Dispersion Force Forces between 2 molecules that are non- polar or have no dipole moment Attraction of p+ of one molecule for the e- on another molecule This creates a temporary dipole on each molecule, which interact oppositely https://www.youtube.com/watch?v=1iYKaj MsYPY

Honors – Type 4: Ion-Dipole Interaction The interaction of a fully charged ion in solution with the oppositely charged dipole of the molecule making up the solution. Predict: what would happen if you put NaCl in water? How would the resulting solution look after you mixed it?

Non Newtonian Fluid

Molecular Shape and Polarity Because all molecules take on different molecular shapes, some molecules may contain polar bonds and ultimately be polar OR non-polar molecules. Draw each example with its electron pair and molecular geometry to determine if the molecule is overall polar or non-polar

Name the interaction! Hydrogen interaction

Name the interaction! London Dispersion

Name the interaction! Dipole-dipole

Homework Worksheet on drawing intermolecular forces DUE: Mon/Tue Dec. 1/2