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

Gold (atomic radius =0.144 nm) crystallises in a face centred unit cel

1.	Gold (atomic radius =0.144 nm) crystallises in a face centred unit cell. What is the length of the side of the cell ?
Answer» SOLUTION :For FCC, `a=2sqrt2r`=2 X 1.414 x 0.144 NM = 0.407 nm