The cubic unit cell of Al (molar mass 27 g mol^(-1)has an edge length of 405 pm. Its density is 2.7 g cm^(-3)). The cubic unit cell is

The cubic unit cell of Al (molar mass 27 g mol^(-1)has an edge length

1.	The cubic unit cell of Al (molar mass 27 g mol^(-1)has an edge length of 405 pm. Its density is 2.7 g cm^(-3)). The cubic unit cell is
Answer» face centred body centred primitive edge centred Solution :`d=(ZtimesM)/(a^(2)timesN_(0)times10^(-30))` `"or "Z=(d TIMESA^(3)timesN_(0)times10^(-30))/M` =`(2.7times(405)^(3)TIMES(6.02times10^(23))10^(-30))/27=4` Hence it is face centred CUBIC unit cell.