ï»¿ An element (At. mass 60) have face centred cubic structure has a density of 6.23 g cm–3. What is the edge length of the unit cell? from Chemistry The Solid State Class 12 Nagaland Board

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An element (At. mass 60) have face centred cubic structure has a density of 6.23 g cm–3. What is the edge length of the unit cell?

Solution:
we have given that
Atomic mass of element = 60.
Number of atoms per fcc unit cell = 4
Density of the element = 6.23 g/cm
3

Density,         $\mathrm{d}=\frac{\mathrm{N}×\mathrm{M}}{{\mathrm{N}}_{\mathrm{A}}×{\mathrm{a}}^{3}}$

or

Therefore, edge of unit cell, a = 400 pm.
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