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30/12/2021 7:05 pm
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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?
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30/12/2021 7:06 pm
For a face-centred unit cell
a = 2√2r
It is given that the atomic radius, r = 0.144 nm
So, a = 2√2 x 0.144 nm
= 0.407 nm
Hence, length of a side of the cell = 0.407 nm