Since, edge of the unit cell is 3.28 Ã…
volume of the unit cell = 3 x 3.28 x 10-8
cm3
= 9.84 x 10-8 cm3
Given that density of cell = 6.50
= weight of the cell/ volume of the cell
Hence, weight of the cell = 6.5 x (9.84 x 10-8)
                                              Â
= 63.96 x 10-8g
But in body cantered cubic lattice contain two atoms each
Hence atomic weight = weight of the unit cell / 2
                                              Â
= 31.98 x 10-8 g
