Each edge of a cubic unit cell is \( 400 \mathrm{pm} \) long. If atomic mass of the element is 1...

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Each edge of a cubic unit cell is \( 400 \mathrm{pm} \) long. If atomic mass of the element is 120 and its density is \( 6.25 \mathrm{~g} / \mathrm{cm}^{3} \), the crystal lattice is: (use \( N_{A}=6 \times 10^{23} \) )
(a) primitive
(b) body centered
(c) face centered
(d) end centered
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