Q8 / 150 · MHT CET 2019 (Shift 1) · Chemistry

If a metal crystallises in bcc structure with edge length of unit cell 4.29×10-8 cm the radius of metal atom is

  • A
    3.2×10-7cm
  • Correct answer
    B
    1.86×10-8cm
  • C
    1.07×10-7cm
  • D
    1.07×10-8cm

Solution

The relation between edge length and radius of an atom in a bcc structure is related as:
r=3/4α
Given, a=4.29×10-8cm
For bcc structure,
r=34a=34×4.29×10-8cm
=1.857×10-8cm≃1.86×10-8cm

Hence, the correct answer is option: 'B'.

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