An element with density 10 g `cm^(-3)` forms a cubic unit cell with edge length of `3xx10^(-8)` cm.What is the nature of the cubic unit cell if the atomic mass of the element is 81 g `mol^(-1)`

Explanation

`d=(ZxxM)/(a^3xxNo)`
`d=10gcm^(-3),M=81g mol^(-1)`
`a^3=(3xx10^(-8)cm)^3=27xx10^(-24)cm^3,N_o=6.022xx10^(23)`
`10=(Zxx81)/((27xx10^(-24)xx(6.22xx10^(23))=Z=2.007=2`
Nature of cubic unit cell bcc.