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Gold crystallizes in a FCC lattice, the observed unit cell length is 4.070 Å. Calculate the radius of a gold atom.

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Gold crystallizes in a FCC lattice, the observed unit cell length is 4.070 Å. Calculate the radius of a gold atom. 

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Given: Edge length of unit cell 

(a) = 4.070 Å 

To find: Radius (r) =? 

Formula:

Calculation: 

Since Au crystallizes in face centred cubic 

(FCC) structure 

From formula,

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