Presentation on theme: "Bellwork 11-20-2014: Honors Write the chemical formula for Potassium Permanganate. Write the chemical formula for Sodium Chromate. Name the compound."— Presentation transcript:
1Bellwork : HonorsWrite the chemical formula for Potassium Permanganate.Write the chemical formula for Sodium Chromate.Name the compound Ca(OH)2Have out your homework (polyatomic and monoatomic ion worksheets) to be stamped!
2Announcements: Honors Deadlines:Summative writing assignment: today after schoolTurn in lab for late grade: today after schoolTutoring moved to TODAY
3Vocab 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
4Vocab Smash Game RulesYou cannot start FAST WALKING until I have read the question completelyNO RUNNING OR PUSHING!Teammates: DO NOT YELL OUT THE ANSWER!Each correct hit = 1 pointIf there is a tie: the face off will be correctly writing the chemical formula for an ionic compound
6BellworkHave 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 methodName the compound: MgO using the rules from your note-taker
7Announcements Go over homework If you did not show me your labs today, I need to see them by tomorrow!
9Where are we? Intramolecular forces Intermolecular forces Between elementsLewis structures of single elements and molecule bondsBetween moleculesLewis structures of molecules (interactions)IonicCovalentDipole-dipoleHydrogenAnionCationPolarNon-polarLondon dispersionIon-dipoleMolecular shapesPolarity
10Intermolecular 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)
11QuizExplain how ionic bonds are formed using cations, anions, charge (+/-) and give an example.
12Intermolecular Forces: Exploration We will come back to this substance and figure out what it is later!!
13Intermolecular Forces So far we have been looking at bonds and the forces that hold elements together in a compoundWhat were these forces?Now we will look at INTER molecular forces: the forces that hold 2 or more different compounds or molecules together.
14Type 1: Dipole-DipoleDipole 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
16Dipole-Dipole Interaction The attraction of one molecules dipole for the opposite dipole on another moleculeHClHCl
17Type 2: Hydrogen Interaction More specific dipole-dipole interactionH-interaction:The interaction of hydrogen’s dipole with opposite dipole on a O, N or F atom ONLY
18Water DemosWhy does the soap make the cinnamon scatter?Soap Molecule
19Type 3: London Dispersion Force Forces between 2 molecules that are non- polar or have no dipole momentAttraction of p+ of one molecule for the e- on another moleculeThis creates a temporary dipole on each molecule, which interact oppositelyhttps://www.youtube.com/watch?v=1iYKaj MsYPY
21Honors – 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?
24Molecular 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