1.

Aluminium crystallizes in a ccp structure. Its metallic radius is 125pm. The number of unit cells in 1.00 cm^(3) of Al are

Answer»

`2.27 xx 10^(22)`
`1.13 xx 10^(20)`
`2.26 xx 10^(26)`
`1.13 xx 10^(23)`

Solution :For ccp STRUCTURE
`a = 2 sqrt(2) R = 2 xx 1.414 xx 125 = 353.5 `pm
or `353.5 xx 10^(-10) `cm
Volume of unit CELL `= ( 353.5 xx 10^(-10))^(3)`
`= 4.42 xx 10^(23) cm^(3)`
No. of unit cells in 1 `cm^(3)`


Discussion

No Comment Found

Related InterviewSolutions