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NEET 2009
Exam
NEET
Year
2009
Subject
Chemistry
Chapter
Solid State

NEET 2009 · Chemistry · Solid State

Copper crystallises in a face-centred cubic lattice with a unit...

Copper crystallises in a face-centred cubic lattice with a unit cell length of 361pm361 \mathrm{pm}. What is the radius of copper atom in pm ?

Options

  1. A128
  2. B157
  3. C181
  4. D108

Correct answer

A. 128

Step-by-step solution

In case of face-centred cubic lattice,  radius =2a4∴\text{ radius }=\frac{\sqrt{2} a}{4}\therefore Radius of copper atom ( lattice) =2×3614=\frac{\sqrt{2} \times 361}{4}=128 pm.\mathrm{pm} .
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