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6.4 VSEPR (Molecular Shapes)

6.4 VSEPR (Molecular Shapes). V Valence S Shell E Electron P Pair R Repulsion. I hate you!. Stay away from me!. e -. e -. VSEPR: theory that predicts some molecular shapes based on idea that pairs of valence electrons surrounding an atom repel each other.

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6.4 VSEPR (Molecular Shapes)

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  1. 6.4 VSEPR (Molecular Shapes)

  2. VValence SShell EElectron PPair RRepulsion I hate you! Stay away from me! e- e- VSEPR: theory that predicts some molecular shapes based on idea that pairs of valence electrons surrounding an atom repel each other

  3. Common shapes you should know Tetrahedral pyramid with 4 faces

  4. Trigonal pyramidal squished pyramid

  5. Trigonal Planar hood ornament of Mercedes peace sign missing a limb

  6. Bent

  7. Linear

  8. How do we figure out the shape of a molecule?

  9. Step 1: Draw the Lewis structure for the molecule. example: NH3

  10. Step 2: Count the number of "things" on the atom you're interested in (the center atom). Count atoms and lone pairs, NOT BONDS! example: NH3 H H N H

  11. Step 3: Count the number of lone pairs that are on the atom you're interested in. Lone pairs on other atoms aren't important; only count what is directly stuck to the atom you're interested in. example: NH3 H H N H

  12. Practice 1. CH4

  13. 2. CO2

  14. 3. carbon tetrabromide 4. phosphorus trichloride

  15. 5. boron trichloride 6. sulfur difluoride

  16. How does shape affect polarity?

  17. Practice: are the following molecules polar or nonpolar? 1. CF4 2. SF2

  18. 3. NF3 4. BeCl2

  19. Drag the figure showing the shape for this molecule into the box below. CO2

  20. Drag the figure showing the shape for this molecule into the box below. AsF5

  21. Drag the figure showing the shape for this molecule into the box below. SO3

  22. Drag the figure showing the shape for this molecule into the box below. NH4+

  23. Drag the figure showing the shape for this molecule into the box below. SCl6

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