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What will be the percent fraction of edge length not covered by atoms when a metal crystallises in bcc lattice?A. `11.4%`B. `10.4%`C. `13.4%`D. `12.4%`

Answer» Correct Answer - C
`"Fraction"=(a-2R)/(a),R=(sqrt3a)/(4)`
`=(a(1-(2sqrt3)/(4)))/(a)=1-(sqrt3)/(2)=0.134`
`%=13.4`


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