Tungsten crystallises in a body centred cubic unit cell. If the edge of the unit cell is 316.5 pm, what is the radius of tungsten atom ?
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Correct Answer – 137 pm
For a body centred cubic unit cell (bcc)
Radius `(r)=(axxsqrt3)/(4)=((316.5″pm”)xxsqrt3)/(4)=”137 pm”.`