Calculation of edge length and radius of atom.

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Calculate the radius of copper atom if it crystallise in face centred cubic lattice and has a density of 8.93 g / cm cube.

Solution

Structure given = fcc

For fcc , Z = 4

Density , d = 8.93

Molar mass , M = 63.55

Avogadro number = 6.2×10^23

Use the given formula

In case of fcc arrangement, we have

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