Molecule Shapes Learning Goals: Students will be able to:

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Presentation transcript:

Molecule Shapes Learning Goals: Students will be able to: Identify substances to which “Molecular geometry” applies. Name molecule and electron geometries for basic molecules. Explain the model being used to predict molecule geometry. Predict common molecular geometry from the number of electron pairs and bonded atoms around a central atom of basic compounds. by Trish Loeblein updated October 2011

CO2 CaCl2 NH4Cl Li2SO4 Which is a molecule? Make sure to ask :How did you decide? A because it has only non-metals; Remind students that ionic compounds made of metals-nonmetals or polyatomic ions are not.

2. Which would have a linear shape? HBr CO2 Both are linear C

3. Which has only single bonds? HBr CO2 Both have all single bonds A

4. What shape is water? Tetrahedral Bent Trigonal planar Linear B

5. Which is an example of an exception to the octet rule? BF3 I2 More than one of these Make sure to ask :How did you decide? C

5ans. Which is an example of an exception to the octet rule? BF3 I2 More than one of these Make sure to ask :How did you decide? C

6. Which molecule could be represented with this diagram? BH3 CH4 NH3 C 6b. What would the structural formula look like?

7. Which molecule could be represented with this diagram? HCl CH4 NH3 F2 A 7b. What would the structural formula look like?