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Solid xenon forms crystals with a face centered unit cell that has an edge of 620 pm.1. calculate the atomic radius of xenon.2. calculate the packing efficiency if xenon. Solution) 1) For fcc, edge = √8rTherefore, 620 = 2.82*ri.e., r = 620/2.82 = 219.86 pm2) For fcc, packing efficiency = 74%
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