Atomic radius of aluminium is 125 pm. If...

Atomic radius of aluminium is 125 pm. If aluminium has a fcc structure, calculate the edge length of the unit cell.

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The correct Answer is:

353.5 pm

Atomic radius (r) = 125 pm. For a fcc unit cell,
Edge length (a) = `2sqrt2r=2xx1.4142xx(125"pm")=353.5"pm."`

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