Al (atomic mass =27) crystallises in a cubic system with edge length (a) equal to `4Å` its density is `2.7 g//cm^(3)` The type of the unit cell is:A. SimpleB. Face centredC. Body centredD. None of these

Al (atomic mass =27) crystallises in a cubic system with edge length (

1.	Al (atomic mass =27) crystallises in a cubic system with edge length (a) equal to `4Å` its density is `2.7 g//cm^(3)` The type of the unit cell is:A. SimpleB. Face centredC. Body centredD. None of these
Answer» Correct Answer - B Density `(rho)=(ZxxM)/(N_(0)xxa^(3))` `2.7=(Zxx27)/(6.022xx10^(23)xx(4)^(3)xx(10^(-24)))` On calculation, Z=4 (face centred)

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Al (atomic mass =27) crystallises in a cubic system with edge length (a) equal to `4Å` its density is `2.7 g//cm^(3)` The type of the unit cell is:A. SimpleB. Face centredC. Body centredD. None of these

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