Same chapter3 marksDifficulty: Medium
How many atoms are there in a face-centred cubic unit cell?
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3 marksDifficulty: Medium
A metal crystallises in a body-centred cubic lattice with an edge length of 400 pm. Calculate the radius of the metal atom.
Original Khojo Papers practice question — not from a past board paper.
Answer
About 173 pm
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
For a bcc lattice the body diagonal equals 4r, and the body diagonal is a√3, so r = a√3/4 = 400 × 1.732 ÷ 4 ≈ 173 pm.
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Solutions