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Copper crystalline in a face centred cub...

Copper crystalline in a face centred cubic lattice with a unit cell length of `361p m` .What is the radius of copper atom in p m?

A

`157`

B

`181`

C

`108`

D

`128`

Text Solution

Verified by Experts

The correct Answer is:
4
For a face-centred cubic unit cell, we have
`4r=sqrt(2a)`
or `r=sqrt(2)/(4)a`
`=(1.414)/(4)(361p m)`
`=127.6p m`
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