Lithium forms body centred cubic structure .The length of the side of its unit cells is 351 pm.A tomic radius of lithium will be :
A. 75 pm
B. 300 pm
C. 240 pm
D. 152 pm
A. 75 pm
B. 300 pm
C. 240 pm
D. 152 pm
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Correct Answer – D
For body centred cubic unit cell
`asqrt(3)=4r`
`r=(asqrt(3))/(4)=(351xx1.732)/(4)=152`pm