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The percentage of unoccupied volume in simple cubic cell isA. 0.524B. 0.32C. 0.476D. 0.6804

Answer» Correct Answer - C
`= ("Volume of one atom")/("volume of cubic unit cell") xx 100%`
For simple cubic cell,
packing effeciency `= ((4)/(3) pi r^(3))/(8 r^(3)) xx 100 = 52.4%`
`:.` Percentage of unoccupied volume in Scc
= 100-52.4 = 47.6%


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