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# The distance in pico metres between centres of two closest sodium atoms in the body centred cubic lattice of sodium metal with a unit cell length of $4.3 \: A$ is

$\begin {array} {1 1} (1)\;372 & \quad (2)\;328 \\ (3)\;256 & \quad (4)\;214 \end {array}$

Can you answer this question?

(1) 372
answered Nov 7, 2013 by