Calculate the volume of bcc unit cell if the radius of an atom in it is 216.5 pm .
- A$1.012 \times 10^{-22} \mathrm{~cm}^3$
- B$1.25 \times 10^{-22} \mathrm{~cm}^3$
- C$2.130 \times 10^{-22} \mathrm{~cm}^3$
- D$2.541 \times 10^{-22} \mathrm{~cm}^3$
✓ Correct answer: B
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