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JEE Main 2012Offline
Exam
JEE Main
Year
2012
Mode
Offline
Subject
Chemistry
Chapter
Solid State

JEE Main 2012 · Offline · Chemistry · Solid State

Lithium forms body centred cubic structure. The length of the side...

Lithium forms body centred cubic structure. The length of the side of its unit cell is 351pm351 \mathrm{pm}. Atomic radius of the lithium will be:

Options

  1. A75 pm75 \mathrm{~pm}
  2. B300 pm300 \mathrm{~pm}
  3. C240 pm240 \mathrm{~pm}
  4. D152 pm152 \mathrm{~pm}

Correct answer

D. 152 pm152 \mathrm{~pm}

Step-by-step solution

For BCC, 3a=4r\sqrt{3} a=4 r r=3×3514=152 pmr=\frac{\sqrt{3} \times 351}{4}=152 \mathrm{~pm}
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