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प्रश्न
An element crystallises in body-centred cubic structure. If the edge length of the cubic unit cell is 400 pm, the interatomic distance in the crystal is ______.
विकल्प
346.4 pm
282.8 pm
400 pm
200 pm
MCQ
रिक्त स्थान भरें
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उत्तर
An element crystallises in body-centred cubic structure. If the edge length of the cubic unit cell is 400 pm, the interatomic distance in the crystal is 346.4 pm.
Explanation:
Given: Edge length (a) = 400 pm
In bcc,
Nearest neighbour distance = `sqrt 3/2 xx a`
= `sqrt 3/2 xx 400`
= `(1.732 xx 400)/2`
= `692.8/2`
= 346.4 pm
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