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The volume of atom present in a face-centred cubic unit cell of a metal (`r` is atomic radius ) isA. `(20)/(3) pir^(3)`B. `8pir^(3)`C. `4pir^(3)`D. `(16)/(3)pir^(3)` |
Answer» Correct Answer - D For fcc, `Z_(eff) = 4//"unit cell"` Volume of atoms in the unit cell `= 4/3 pir^(3) xx Z_(eff)` `= 4/3 pi r^(3) xx 4` `= (16)/(3) pir^(3)` |
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