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Calculate the density of unit cell of sodium, if the edge length of cubic structure is 4.24 A^(@). |
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Answer» Solution :DENSITY `d=(ZxxM)/(a^(3)N_(0))` Z = Number of atoms per unit cell = 2 (since Na crystallise in BCC lattice) M = Gram atomic mass of sodium = 23 g `mol^(-1)` No = Avogadro number = `6.023 xx 10^(23)` a = Edge length = 4.24 ANGSTROMS `=1.002xx10^(3) kgm^(-3)` |
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