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Copper crystallizes in a face-centred cu...

Copper crystallizes in a face-centred cublic lattice with a unit cell length of 361pm. What is the radius of copper atom in pm ?

A

157

B

181

C

108

D

128

Text Solution

Verified by Experts

The correct Answer is:
D
For fcc structure,
`r = ( a)/( 2 sqrt( 2)) = ( 361)/( 2 sqrt( 2)) = ( 361)/( 2 xx 1.414)`
`= 127 .6 = 128` pm
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