NEET Chemistry The Solid State Questions Solved

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Silver crystallises in face-centred cubic unit cells. Each side of the unit cell has a length of 409 pm. What is the radius of silver atom?

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Concept Questions :-

Density/Formula/packing fraction/ Semiconductors

Given : a = 409 pm     r = ?

For fcc unit cell, the formula is

r = a22

or r = 40922 = 4092×1.414 = 4092.828

 r = 144.62

 Radius of an atom of silver = 144.62 pm

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