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Copper crystallises in face-centred cubi...

Copper crystallises in face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

A

128

B

157

C

181

D

108

Text Solution

Verified by Experts

The correct Answer is:
A
In case of face centred cubic lattice,
radius ` = (sqrt2a)/(4)`
` therefore ` Radius of copper atom (fcc lattice)
` = (sqrt(2) xx 361)/(4) = 128 ` pm
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