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Copper crystallises in fcc lattice with ...

Copper crystallises in fcc lattice with a unit cell edge of 361 pm. The radius of copper atom is `:`

A

108pm

B

128 pm

C

157 pm

D

181 pm

Text Solution

Verified by Experts

The correct Answer is:
B
`4r = sqrt(2) a `
`r = ( sqrt( 2) a )/( 4) = ( sqrt( 2) xx 361 )/( 4) = ( 1.414 xx 361)/( 4)`
`= 127.61~~ 128`pm
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