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JEE Advanced2010ChemistrySolid StateActual

The packing efficiency of the two-dimensional square unit cell shown below is

Options

  1. A39.27 %
  2. B68.02 %
  3. C74.05 %
  4. D78.54 %

Correct answer

D. 78.54 %

Step-by-step solution

a=(2 2 r) Packing fraction = 2 r^2 2( 2 r)^2 = 2 r^2 8 r^2 = 4 Solid state Basic analysis (understanding) II

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