Suppose the radius of an atom of an element is \( 75 \mathrm{pm} \)...

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Suppose the radius of an atom of an element is \( 75 \mathrm{pm} \) and the lattice type is body centred cubic, what is the edge of the unit cell?
(a) \( 173.2 \mathrm{pm} \)
(b) \( 137.2 \mathrm{pm} \)
(c) \( 123.7 \mathrm{pm} \)
(d) \( 153.2 \mathrm{pm} \)
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