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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

157

B

181

C

108

D

128

Text Solution

Verified by Experts

The correct Answer is:
D
Copper crystallises in a faces centred cubic lattice,
Atomic radius `(r)=a/(2sqrt(2))`
`=361/(2xx1.41)=127.6 approx 128 "pm"`
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