Lithium crystallises into body centered cubic structure. What is the radius of lithium if edge length of…

Lithium crystallises into body centered cubic structure. What is the radius of lithium if edge length of it's unit cell is $351 \mathrm{pm}$ ?
  1. $151.98 \mathrm{pm}$
  2. 300.50pm
  3. 75.50pm
  4. $240.80 \mathrm{pm}$

Solution

For bcc unit cell, $r=\frac{\sqrt{3} a}{4}=\frac{\sqrt{3} \times 351}{4}=151.98 \mathrm{pm}$

Asked in: MHT CET 2020 (14 Oct Shift 1)

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