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An element with atomic mass 60 having fc...

An element with atomic mass 60 having fcc structure has a density of `6.23 "g/cm"^3`.What is the edge length of unit cell ?

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`a^(3)=(Z xx M)/(N_(0)xx rho)=(4xx60)/(6.02xx10^(23)xx6.23)`
a = 400 pm
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