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CGP EDU Academic Team
Published on: August 14, 2026
Sodium metal crystallises in a body centred cubic lattice with unit cell edge length of 4 
. The radius of sodium atom is___x 10 -1 
. (Nearest integer)
Text Solution
Verified by ExpertsThe correct answer is:
17
(17) Edge length of the unit cell = 4 x 10 -8 cm
Radius of sodium atom (r) =?
Since, sodium crystallises in body centered cubic arrangement.
The radius of the atom and the edge length of the cubic unit cell are related as follows,
For bcc structure, 
r = 1.732 x 10 -8 cm
r = 17.3 
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