Solids Worksheet

 

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  1. What are two broad categories of solids?

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  2. Types of crystalline solids

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  3. What is X-ray diffraction used for?

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  4. What is the Bragg equation?

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  5. A topaz crystal has an interplanar spacing (d) of 1.36 x 10-10 m.  Calculate the wavelength of the X-ray that should be used if θ = 15.0o (assume n = 1).

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  6. What are 3 ways a crystalline solid can be arranged?

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      1. Illustrations

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      2. Facts

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        1.  Volume =

           

          r =

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        2. # of nearest neighbors –

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        3. type of packing –

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        4. Total atoms within unit cell –

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        5. % of space used -

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      1. Illustrations

        2.  

      2. Facts

          3.  

        1. Volume =

           

          r =

          2.  

        2.  # of nearest neighbors –

          3.  

        3. type of packing –

          4.  

        4. Total atoms within unit cell –

          5.  

        5. % of space used -

        4.  

      1. Illustrations

        2.  

      2. Facts

          3.  

        1. Volume -

           

          r =

          2.  

        2.  # of nearest neighbors –

          3.  

        3. type of packing –

          4.  

        4. Total atoms within unit cell –

          5.  

        5. % of space used -

     

  7. A helpful formula for dealing with cubic structures and density:

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  8. A certain form of lead has a cubic closest packed structure with an edge length of 492 pm. Calculate the value of the atomic radius and density of the lead.

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  9. You are given a small bar of an unknown metal X.  You find the density of the metal to be 10.5 g/cm3.  An X-ray diffraction experiment measures the edge of the face centered cubic unit cell as 4.09 x 10-10 m.  Identify X.

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