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Silver crystallises with face - centred ...

Silver crystallises with face - centred cubic unit cells .each side of the unit cell has a length of 409 pm . What is the radius of an atom of silver ? (Assume that each face atom is touching the four corner atoms.)

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For face-centred cubic unit of an element , `r=a/(2sqrt2)` = 0.3535 a = 0.3535 x 409 pm =144.6 pm
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