Question

An element x with atomic mas 81 u has density 10.2 g cm-3. If the volume of unit cell is 2.7 * 10-23 cm3, identify the type of unit cell

Answer 1

Density of unit cell =

( Z(Rank) * Atomic mass) /

( Avogadro number * Volume)

Just substitute everything and find the value of Z, if Z is close to 1,the type of unit cell will be Simple Cubic

If Z is close to 2,BCC

And if Z is close to 4,FCC

Hope this helped