Sodium crystallises in the cubic lattice and the edge of the unit cell is \( 430 \mathrm{pm} \)....

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Sodium crystallises in the cubic lattice and the edge of the unit cell is \( 430 \mathrm{pm} \). Calculate the number of atoms in a unit cell.
\( P \) [Atomic mass of Na \( =23.0 \mathrm{amu} \), Density of sodium \( =0.9623 \mathrm{~g} \mathrm{~cm}^{-3}, \mathrm{~N}_{\mathrm{A}}=6.023 \times 10^{23} \mathrm{~mol}^{-1} \) ]

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