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Niobium has a density of 8.57 g/cm3 and crystallizes with the body-centered cubic unit cell. Calculate the radius of a niobium atom.

Caroline Campbell

in Physics

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Deborah Edwards on August 27, 2018

For a body-centered unit cell has 2 atoms /cell. The radius can be calculated by the equation:k3^2 = (4r)^2We calculated as follows:V = 1 / (8.57 g/cm^3 ( 1 mol / 92.91 g ) ( 6.022 x 10^23 atoms / 1 amol ) ( 1 unit cell (2 atoms )) = 3.60x10^-23 cm^3d = 3.30 x 10^-8 cmr = 1.43 x 10^-8 cm


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