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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

128 pm

B

157 pm

C

181 pm

D

108 pm

Text Solution

Verified by Experts

The correct Answer is:
A
In case of face centred cubic (fcc) lattice,
`"radius"=(sqrt2a)/(4)`
`therefore` Radius of copper atom (fcc lattice)
`(sqrt2xx361)/(4)=128" pm"`
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