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Copper crystallises in fcc with a unit c...

Copper crystallises in fcc with a unit cell length of 361 pm. What is the radius of copper atom?

A

108 pm

B

127 pm

C

157 pm

D

181 pm

Text Solution

Verified by Experts

The correct Answer is:
B
In fcc unit cell, (a=361 pm)
`4r=sqrt(3)a`
`r=(sqrt(3))/(4)a`
`=(sqrt(3))/(4)xx361`
`r=127pm`
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