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  • Gold (atomic radius = 0.144 nm) crystallises in a face-centred unit cell. What is the length of a side of the cell?

1.21     Gold (atomic radius = 0.144 nm) crystallises in a face-centred unit cell. What is the length of a side of the cell?

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Atomic radius = 0.144 nm

 for  a face-centred unit cell

a=2 \sqrt{2} r

a=2 *1414*0.144 nm

a=0.407 nm

the length of a side of the cell is 0.407.

Posted by

seema garhwal

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