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Gold (atoic radius = 0.144 nm) crystalli...

Gold (atoic radius = 0.144 nm) crystallizes in a facelcentred unit cell. What is the length of a side of the cell?

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For a face centred cubic unit cell (fcc)
Edge length `(a)=2sqrt(2r)=2xx1.4142xx0.144mm=0.407nm`
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