Solid State - Result Question 46

####46. Sodium crystallises in a bcc cubic lattice with the cell edge, a=4.29\AA. What is the radius of sodium atom?

(1994,2M)

Show Answer

Answer:

Correct Answer: 46. (1.86\AA)

Solution:

  1. In bcc arrangement of atoms : 4r=3a, atoms on body diagonal remain in contact

⇒r=3a4=3×4.294=1.86\AA

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